Whirlpool Defrost Thermostat WP4387490 OEM Part

Whirlpool offers a diverse range of products through well-known brands like Whirlpool, Amana, KitchenAid, Maytag, Jenn-Air, Magic Chef, Roper, and Admiral. It also produces components for retailers such as Sears-Kenmore and Ikea. Among these crucial components is the Defrost Bimetal, an original equipment manufacturer (OEM) part crucial to the performance of Whirlpool refrigerators. This thermostat ensures the freezer's defrost system runs smoothly by tracking and regulating the temperature of the evaporator coils, preventing overheating. It achieves this by deactivating the defrost heater once the coils hit a predetermined temperature threshold.

Indicators of a faulty defrost bimetal include:

- Persistent frost on evaporator coils after defrost cycles
- Inadequate cooling in the refrigerator or freezer compartments
- Continuous operation of the refrigerator compressor

Bimetal failure is commonly attributed to factors such as corrosion, extended exposure to extreme temperatures, and natural wear, which can hinder its temperature responsiveness.

This OEM component is also suitable for models from brands including Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore.

This part helps rectify issues like:
- Inability of the freezer to defrost
- Excessive warmth in the refrigerator