My defroster is not working. I checked the heater and there is continuity between the beginning and end of the heater tube. There is some resistance (I don't remember the ohm reading, but it was on the order of 50 ohms). I put the thermostat in ice water and did not get continuity, so I replaced it. The heater is still not coming on. The defrost timer does click over and shuts off the compressor. What should I do next? What is the voltage/amperage that goes to the heater? Can I check that from the timer? Is there a way to check the wiring from the timer to the connector in the freezer by the evaporator? I am concerned that a mouse might have gotten into the mechanical areas of the refrigerator.
ANSWER Hello Rich. Turn the timer to the defrost cycle and test for 120 volts coming to the heater when the thermostat is cold. If there is power there, and the heater does not work, replace the heater. If there is no power, then you either have a bad wire or the timer is bad on the unit.
Answered by AppliancePartsPros.com | Tuesday, May 01, 2012