My defrost cycle isn't working. I checked the defrost heater element and the defrost thermostat and they both have continuity. Is the main control board the only other possibility or are there other things I need to check? Thanks, John
Answer Hello John,
The electronically controlled defrost system by GE has 4 components. They include the defrost heater, the defrost thermostat, the evaporator thermistor, and the electronic control board. If you have replaced the heater and thermostat, the next obvious part to replace is the evaporator thermistor WR55X10025. If these do not correct the issue, the main control board WR55X10942 is the only part left. Since GE didn't provide a way to force the unit into defrost, all that can be done is test the parts and replace the ones further from tolerance.