Skip for Model Number GSE22ETHBCC Help. Freezer not defrosting. Repair guy replaced evap thermister. Still froze over. I replaced heating element, thermostat, and circuit board. Still no defrost cycle as evap coils will frost over within a week. Only thermister i haven't replaced is the freezer lower unit, but I checked with an ohm meter and it read 16K. Whats next? How can i test the board to make sure it is cycling. I'm good with a multimeter.
Answer Skip, The lower thermistor should not have anything to do with the unit not defrosting and it would be recommended to check at the main control board to see if the evaporator thermistor is reading the correct resistance. The thermistor sitting on the evaporator coils should have a resistance reading of approximately 42.2K ohms of resistance. Either the thermistor being faulty or the wiring between the thermistor and the control board being faulty would likely cause this issue. Read More... Answered by AppliancePartsPros.com | Thursday, March 26, 2020