The Defrost Thermostat is an OEM part for GE refrigerators. It plays a critical role in the refrigerator's defrost system, preventing frost build-up on the evaporator coils by turning the defrost heater on and off at appropriate times. This component is designed to sense the temperature of the evaporator coils and activate the defrost heater when the coils get too cold, ensuring efficient operation and optimal cooling performance. Symptoms of a bad Defrost Thermostat include: Excessive frost or ice accumulation in the freezer compartment The refrigerator or freezer section becoming too warm The defrost heater not activating, leading to reduced efficiency Causes of a bad defrost thermostat can include damage from moisture or ice, electrical failures within the thermostat, or simply wear and tear from regular use. This GE replacement part is also compatible with Hotpoint, RCA, and some Kenmore models.This part fixes the following symptomsFridge too warmWR50X10071 (AP3884319) replaces 1170027, AH1155320, EA1155320, PS1155320, WR50X10021, WR50X10076, WR50X22303, WR50X22304, WR50X30071.