LG Refrigerator - Freezer defrosted suddenly

Hi @tulls422 ,

Was there a power outage at all?

If not it may be a faulty defrost sensor perhaps. You may have to keep a check on it for a while and see if it occurs again.

Not sure with your model but a lot of LG fridges enter the auto defrost mode once every 8-11 hours. During this time the compressor and the evaporator fan are stopped and the freezer temperature is allowed to rise to 32F (0C) to melt any ice build up on the evaporator unit in the freezer compartment. The ice meltwater drains to the evaporator pan under the cabinet near the compressor. The defrost heater is turned on to help speed up the process as you don’t want any food to even begin to thaw. The whole process takes about 15-25 minutes.

When the freezer temp reaches 32F the defrost sensor signals the control board to turn off the heater and to restart the compressor and the evaporator fan to cool everything back down again to the correct temperatures. This takes a little while to achieve.