4387503 Refrigerator Defrost Thermostat Fit for Whirlpool Sears 2149641 2149643 Description: 4387503 Bimetal Defrost Thermostat stops the fridge from overheating during the defrost cycle by protecting the evaporator. This clip-on thermostat will sense the temperature increase in the evaporator during the defrost process, and will cycle the defrost heater off after the ice or frost is melted. The most common reasons for needing to replace this part are if your unit is leaking, has inconsistent temperatures (too hot or too cold), you are seeing buildup of ice, or your appliance is running too long. Features: New & High-Quality parts (Not Genuine). Design improved for more durability, Stable and updated characteristics, high reliability. Easy installation and great Choice for Direct replacement of original parts. Specifications: Item: 4387503 Refrigerator Defrost Thermostat Manufacturer Part Number: 4387503 Replaces Part Numbers: 2149641, 2149643, 2163894, 2172694, 2182380, 2183072, 2221677, 4343917, 586213, 61002113, AH371255, EA371255, PS371255, R0950042. Compatibility: Compatible with the following s: Whirlpool, Sears, Kenmore, Roper, Estate, KitchenAid, Amana, Jenn Air, Magic Chef, and Maytag. Package Include: 1pc x Refrigerator Defrost Thermostat _x000D_ _x000D_