Customer Questions and Answers for Refrigerator Defrost Timer by Ge

Dru, This unit does not have a defrost timer. The defrost control is part of the main control board WR55X10942C for your unit. If you are having a defrost issue you will want to check the defrost thermostat WR50X10068 to make sure that it is not open. Check the defrost heater WR51X10042 to make sure that it has continuity. Check the defrost thermistor WR55X10025 resistance. The resistance of the thermistor at 0 degrees should be 42.2K ohms of resistance, at 37 degrees would be 14.4K ohms and 77 degrees would be 10 k ohms. If out of range then it would need to be replaced. If this checks ok and the thermostat and heater have continuity then the control board would need to be replaced.