Why is my washer stop mid cycle and won't take in soap and keep saying

@vassie the F20 error code indicates no water was detected entering the washer. Check to make sure that your faucets are open and that you have water pressure. Make sure hot and cold water valves are turned on. After that you may have to check your water inlet valves to ensure the little screens are not clogged and check the valves itself to make sure they are working. You can download the service manual for this washer from the bottom of this page Kenmore Elite HE3 Washing Machine Repair - iFixit

If there is water in the unit:
Verify that the pressure switch hose is in good condition and properly connected to tub and pressure switch.
Unplug washer or disconnect power.
Verify there is not a siphon problem.
Verify wire harness connections to inlet valves, pressure switch, flow meter, and Central Control Unit (CCU).
Check all hoses for possible leaks.
Plug in washer or reconnect power.
Verify pressure switch operation.
Verify flow meter operation by blowing air through the part and measuring the resistance.
Verify CCU operation by running a Diagnostic test or any cycle
from here