Ohmic Self-Heating of Thermostats

Introduction If you get the the expected “S” during a Whirlpool Refrigerator Jazz Board model’s defrost system diagnostic mode, and it changes to the dreaded “O” after only a minute or two, you likely have “ohmic self-heating” of the bimetal thermostat. What is Ohmic Self-Heating? Ohmic self-heating is based on the concept of “ohmic heating”, […]