According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat module setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one of them looking like the usual round bi-metal defrost thermostat though.
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. These values are not for the thermostats used in your freezer as far as I know.
Based on the image and the parts diagrams the temperature thermostat would be the one mounted in the air column and the defrost thermostat would be the one attached to the evaporator unit
Disconnect the thermostat cable and then connect an Ohmmeter across the two black wires (defrost thermostat) and then the two white (grey?) wires (temperature thermostat) of the thermostat cable plug and check what resistance you measure''.'' ''They both should ***not measure*** either open circuit (OL) or short circuit (0.00 Ohms).'' As to what they should measure I don't know.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connected to the main control board J1 plug socket pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC.''
If there's no power for the heater at the control board connectors when testing during the defrost mode there may be a problem with the [link|https://partsdr.com/part/5304529281-main-control-board|control board part # 5304529281] (supplier example only). Search online for the ''part number only'' to find suppliers that suit you best.
+
Another check would be to ensure that the drain tube leading from under the evaporator unit to the evaporator pan under the cabinet near the condenser coils and compressor etc is not blocked, preventing the defrost meltwater from draining away to be evaporated naturally. Usually an indicator of this is water overflowing into the compartment during or immediately after the defrost cycle. If it is blocked then the water could not drain away and would gather and refreeze and build up again when the defrost cycle ended and the freezer went back to normal operating temperatures. Over time this could be the cause of ice building up over the evap unit and it could even ice over the fan preventing it from operating.
+
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat module setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one of them looking like the usual round bi-metal defrost thermostat though.
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. These values are not for the thermostats used in your freezer as far as I know.
+
Based on the image and the parts diagrams the temperature thermostat would be the one mounted in the air column and the defrost thermostat would be the one attached to the evaporator unit
-
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. These values are not for the thermostats used in your freezer as far as I know
Disconnect the thermostat cable and then connect an Ohmmeter across the two black wires (defrost thermostat) and then the two white (grey?) wires (temperature thermostat) of the thermostat cable plug and check what resistance you measure''.'' ''They both should ***not measure*** either open circuit (OL) or short circuit (0.00 Ohms).'' As to what they should measure I don't know.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connected to the main control board J1 plug socket pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC.''
If there's no power for the heater at the control board connectors when testing during the defrost mode there may be a problem with the [link|https://partsdr.com/part/5304529281-main-control-board|control board part # 5304529281] (supplier example only). Search online for the ''part number only'' to find suppliers that suit you best.
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
-
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat module setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
+
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat module setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one of them looking like the usual round bi-metal defrost thermostat though.
+
+
Based on the image and the parts diagrams the temperature thermostat would be the one mounted in the air column and the defrost thermostat would be the one attached to the evaporator unit
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. These values are not for the thermostats used in your freezer as far as I know
-
Disconnect the thermostat cable and then connect an Ohmmeter across the two black wires and then the two white (grey?) wires of the thermostat cable plug and check what resistance you measure''.'' ''They both should ***not measure*** either open circuit (OL) or short circuit (0.00 Ohms).'' As to what they should measure I don't know.
+
Disconnect the thermostat cable and then connect an Ohmmeter across the two black wires (defrost thermostat) and then the two white (grey?) wires (temperature thermostat) of the thermostat cable plug and check what resistance you measure''.'' ''They both should ***not measure*** either open circuit (OL) or short circuit (0.00 Ohms).'' As to what they should measure I don't know.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connected to the main control board J1 plug socket pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC.''
If there's no power for the heater at the control board connectors when testing during the defrost mode there may be a problem with the [link|https://partsdr.com/part/5304529281-main-control-board|control board part # 5304529281] (supplier example only). Search online for the ''part number only'' to find suppliers that suit you best.
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat module setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. These values are not for the thermostats used in your freezer as far as I know
Disconnect the thermostat cable and then connect an Ohmmeter across the two black wires and then the two white (grey?) wires of the thermostat cable plug and check what resistance you measure''.'' ''They both should ***not measure*** either open circuit (OL) or short circuit (0.00 Ohms).'' As to what they should measure I don't know.
-
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC.''
+
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connected to the main control board J1 plug socket pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC.''
If there's no power for the heater at the control board connectors when testing during the defrost mode there may be a problem with the [link|https://partsdr.com/part/5304529281-main-control-board|control board part # 5304529281] (supplier example only). Search online for the ''part number only'' to find suppliers that suit you best.
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
-
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
+
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat module setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms)'' when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug''.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications were the same.
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. These values are not for the thermostats used in your freezer as far as I know
-
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
+
Disconnect the thermostat cable and then connect an Ohmmeter across the two black wires and then the two white (grey?) wires of the thermostat cable plug and check what resistance you measure''.'' ''They both should ***not measure*** either open circuit (OL) or short circuit (0.00 Ohms).'' As to what they should measure I don't know.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC.''
-
If there's no power for the heater at the control board connectors when testing during the defrost mode there may be a problem with the [https://partsdr.com/part/5304529281-main-control-board|control board part # 5304529281] (supplier example only). Search online for the ''part number only'' to find suppliers that suit you best.
+
If there's no power for the heater at the control board connectors when testing during the defrost mode there may be a problem with the [link|https://partsdr.com/part/5304529281-main-control-board|control board part # 5304529281] (supplier example only). Search online for the ''part number only'' to find suppliers that suit you best.
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms)'' when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug''.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications were the same.
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
-
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
+
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC.''
+
+
If there's no power for the heater at the control board connectors when testing during the defrost mode there may be a problem with the [https://partsdr.com/part/5304529281-main-control-board|control board part # 5304529281] (supplier example only). Search online for the ''part number only'' to find suppliers that suit you best.
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms)'' when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug''.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications was the same.
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms)'' when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug''.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications were the same.
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms) when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications was the same.
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms)'' when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug''.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications was the same.
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
-
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
+
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than one looking like the usual round bi-metal defrost thermostat though.
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms) when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications was the same.
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
-
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
+
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat setup of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms) when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications was the same.
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer.
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms) when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature range was the same.
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms) when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature/resistance specifications was the same.
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
-
This is confirmed by the [document|32336|wiring diagram] for the freezer
+
This is confirmed by the [document|32336|wiring diagram] for the freezer.
-
It is confusing however as the defrost thermostat in the system diagram doesn't show exactly where it is located The freezer temperature thermostat is mounted on the rear of the air tower as shown in the cabinet diagram and also in this [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] so it would seem that you what noticed that is attached near to the top of the evaporator unit is the defrost thermostat.
+
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model seem to be a dual thermostat of some description, judging by the fact that they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they both look more like a regular NTC thermistor type sensors used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
-
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they look more like a regular NTC thermistor type sensor used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms) when you connect an Ohmmeter across the two black wires and the two white (grey?) wires of the thermostat cable plug.'' The two thermistors most probably will not even test the same resistance but then again they might if their temperature range was the same.
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms).''
+
Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean.
-
If the defrost sensor tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
+
If the defrost thermostat tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram)''
+
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram).''
This is confirmed by the [document|32336|wiring diagram] for the freezer
-
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they look more like a regular NTC thermistor type sensor used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
+
It is confusing however as the defrost thermostat in the system diagram doesn't show exactly where it is located The freezer temperature thermostat is mounted on the rear of the air tower as shown in the cabinet diagram and also in this [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] so it would seem that you what noticed that is attached near to the top of the evaporator unit is the defrost thermostat.
-
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located so it would seem that you what noticed that is attached to the top of the evaporator unit is the defrost thermostat.
+
You may be looking for the wrong sort of defrost thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they both have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they look more like a regular NTC thermistor type sensor used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. The only thing that they should not test is either open circuit (OL) or short circuit (0.00 Ohms).
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. The only thing that ''they should not test is either open circuit (OL) or short circuit (0.00 Ohms).''
-
If the defrost sensor tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
+
If the defrost sensor tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8. ***''Be safety aware''*** ''when testing for the heater power as it operates at 120V AC''
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, ''''the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat'' (''part #21 Cabinet diagram)''
+
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat (part #21 Cabinet diagram)''
This is confirmed by the [document|32336|wiring diagram] for the freezer
-
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular NTC thermistor type sensor used in refrigerators/freezer etc rather than the usual round bi-metal thermostat though.
+
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788] (example only to show image of part). To me they look more like a regular NTC thermistor type sensor used in refrigerators/freezer etc rather than the usual round bi-metal defrost thermostat though.
-
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located so it would seem that you noticed that is attached to the top of the evaporator unit is the defrost thermostat.
+
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located so it would seem that you what noticed that is attached to the top of the evaporator unit is the defrost thermostat.
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. Here's a [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|chart] showing the resistance/temperature of different model NTC thermsitors to show what I mean. The only thing that they should not test is either open circuit (OL) or short circuit (0.00 Ohms).
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. Here's an [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|example] showing the resistance/temperature chart of different model NTC thermsitors to show what I mean. The only thing that they should not test is either open circuit (OL) or short circuit (0.00 Ohms).
-
If the defrost sensor test OK then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
+
If the defrost sensor tests OK i.e. not open or short and the resistance value seems reasonable, then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
+
According to the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the freezer has two thermostats, ''''the ''defrost thermostat (part #21 system diagram)'' and the ''freezer temperature thermostat'' (''part #21 Cabinet diagram)''
-
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual round bi-metal thermostat though.
+
This is confirmed by the [document|32336|wiring diagram] for the freezer
-
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram]for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc
+
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular NTC thermistor type sensor used in refrigerators/freezer etc rather than the usual round bi-metal thermostat though.
-
It would be the one you noticed that is attached to the top of the evaporator unit
+
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located so it would seem that you noticed that is attached to the top of the evaporator unit is the defrost thermostat.
-
You are correct that the ''freezer temperature thermostat (part#21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed. This may give a better view of what to look for near the evaporator unit
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. Here's a [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|chart] showing the resistance/temperature of different model NTC thermsitors to show what I mean. The only thing that they should not test is either open circuit (OL) or short circuit (0.00 Ohms).
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases,their resistance decreases.Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. The only thing that they should not test is either open circuit or short circuit. Here's a [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|chart] showing the resistance/temperature of different model NTC thermsitors to show what I mean.
+
If the defrost sensor test OK then use the wiring diagram as it details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
-
Here's the [document|32336|wiring diagram] for the freezer that will help, if the defrost thermostat tests OK i.e. not open circuit or short circuit.
-
-
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
+
As an aside if you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual round bi-metal thermostat though.
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc
It would be the one you noticed that is attached to the top of the evaporator unit
You are correct that the ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed. This may give a better view of what to look for near the evaporator unit
-
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. The only thing that they should not test is either open circuit or short circuit. Here's a [https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|chart] showing the resistance/temperature of different model NTC thermsitors to show what I mean.
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. The only thing that they should not test is either open circuit or short circuit. Here's a [link|https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|chart] showing the resistance/temperature of different model NTC thermsitors to show what I mean.
-
Here's the [document|32336|wiring diagram] for the freezer that will help, if the defrost thermostat tests OK.
+
Here's the [document|32336|wiring diagram] for the freezer that will help, if the defrost thermostat tests OK i.e. not open circuit or short circuit.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual round bi-metal thermostat though.
-
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
+
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc
-
The ''freezer temperature thermostat (part#21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed. This will also let you see what it looks like
+
It would be the one you noticed that is attached to the top of the evaporator unit
-
Here's the [document|32336|wiring diagram] for the freezer that will help.
+
You are correct that the ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed. This may give a better view of what to look for near the evaporator unit
+
+
Most thermistors used in refrigerators/freezer are of the NTC type i.e. negative temperature co-efficient. As the surrounding temperature increases, their resistance decreases. Unless there is a type number on the thermistor itself it would be hard to know what value resistance it should be at the given temperature as there are a lot of different types and they do look very similar. The only thing that they should not test is either open circuit or short circuit. Here's a [https://www.vectorcontrols.com/download/General/temperature_curves_V1-4.pdf|chart] showing the resistance/temperature of different model NTC thermsitors to show what I mean.
+
+
Here's the [document|32336|wiring diagram] for the freezer that will help, if the defrost thermostat tests OK.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual round bi-metal thermostat though.
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
-
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed.
+
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed. This will also let you see what it looks like
Here's the [document|32336|wiring diagram] for the freezer that will help.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
-
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual bi-metal thermostat though.
+
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual round bi-metal thermostat though.
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed.
Here's the [document|32336|wiring diagram] for the freezer that will help.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. They are designed to go permanently open circuit if the temperature is >72°F.
+
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the heater element and the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. The fuses are designed to go permanently open circuit if the temperature is >72°F.
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual bi-metal thermostat though.
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed.
Here's the [document|32336|wiring diagram] for the freezer that will help.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. They are designed to go permanently open circuit if the temperature is >72°F.
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual bi-metal thermostat though.
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
-
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat.
+
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat. Start viewing at ~3:45 minutes into the video to see it being removed.
Here's the [document|32336|wiring diagram] for the freezer that will help.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. They are designed to go permanently open circuit if the temperature is >72°F.
-
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model are both the same type of thermostat (sensor?), presumably as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual bi-metal thermostat though.
+
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model presumably are both the same type of thermostat (sensor?), as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual bi-metal thermostat though.
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat.
Here's the [document|32336|wiring diagram] for the freezer that will help.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. They are designed to go permanently open circuit if the temperature is >72°F.
-
You may be looking for the wrong sort of thermostat. The defrost thermostat and the temperature sensor used in the model are both the same type presumably as they have the same part number Frigidaire part # [https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. They look more like a regular thermistor type sensor rather than a bi-metal thermostat sensor though.
+
You may be looking for the wrong sort of thermostat. The defrost thermostat and the freezer temperature thermostat used in the model are both the same type of thermostat (sensor?), presumably as they have the same part number i.e. Frigidaire part # [link|https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. To me they look more like a regular thermistor type sensor rather than the usual bi-metal thermostat though.
-
Looking at the [https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
+
Looking at the [link|https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
-
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat.
+
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [link|https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat.
Here's the [document|32336|wiring diagram] for the freezer that will help.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.
Hi @adhoc33589
If you measured 56 Ohms between pins 1 & 4 of the defrost heater cable plug then the two thermal fuses electrically connected inline either side of the heater i.e. one on the Active side and one on the Neutral side of the heater are OK. They are designed to go permanently open circuit if the temperature is >72°F.
You may be looking for the wrong sort of thermostat. The defrost thermostat and the temperature sensor used in the model are both the same type presumably as they have the same part number Frigidaire part # [https://www.frigidaireapplianceparts.com/PartDetail/Defrost-Thermostat/5304523788/4963015|5304523788]. They look more like a regular thermistor type sensor rather than a bi-metal thermostat sensor though.
Looking at the [https://www.searspartsdirect.com/model/2luvtou63u-001428/frigidaire-fffh20f3ww0-upright-freezer-parts|parts diagram] for the freezer, the ''defrost thermostat (part #21 system diagram)'' is located in the same area as the evaporator unit, defrost heater etc but unfortunately I cannot find out exactly where. Perhaps you will find it if you look for something similar to the image seen in the part number for the thermostats linked above.
The ''freezer temperature thermostat (part #21 cabinet diagram)'' is mounted on the rear of the air tower. Here's a [https://www.youtube.com/watch?v=pJvfF5H8Iak|video] that shows where it is located. This is ***''not''*** the defrost thermostat.
Here's the [document|32336|wiring diagram] for the freezer that will help.
It details how to get into the defrost mode so that you can check if the defrost heater is getting power or not. The defrost heater is connect to the main control board J1 connector pins 1 & 8.