4387489 / WP4387489 Refrigerator Bimetal Defrost Thermostat from Whirlpool is a genuine OEM part. The Genuine OEM tag guarantees that the part was engineered to Whirlpool's specifications resulting in the highest performance with superior quality
Defrost bi-metal thermostat WP4387489 protects the evaporator from overheating during the defrost cycle.