The Whirlpool WP4387503 Bimetal Defrost Thermostat helps regulate the refrigerator’s defrost cycle by monitoring temperature around the evaporator. This temperature-sensitive component allows the defrost system to operate within its intended range, helping control when the defrost heater switches on and off. By supporting the removal of frost buildup from the evaporator, it helps main... https://www.partsmelange.ca/whirlpool-wp4387503-bimetal-defrost-thermostat-for-refrigerator