The Whirlpool WPW10165425 Bi-Metal Defrost Thermostat for Refrigerator helps regulate the defrost cycle and maintain proper freezer operation. This component monitors the temperature of the evaporator and controls the defrost heater by opening or closing its electrical circuit at specific temperature levels. When the temperature rises to the set limit, the thermostat stops the heater ... https://www.partsmelange.ca/whirlpool-wpw10165425-bimetal-defrost-thermostat-for-refrigerator