The Defrost Heater is an OEM part for GE refrigerators. This part melts away frost that accumulates on the evaporator coils during the cooling cycle. This process is vital for maintaining the efficiency of the refrigerator, ensuring that air can flow freely over the coils to keep the unit cooling effectively.  Causes of a bad defrost heater can include a faulty heater element, electrical issues preventing the heater from activating, or damage to the heater's wiring.   Symptoms of a bad Defrost Heater include: Frost buildup on the evaporator coils The refrigerator or freezer section is too warm The refrigerator is running constantly without cycling off Pools of water or ice on the floor of the freezer compartment This OEM GE part is also compatible with Hotpoint, RCA, and some Kenmore models.WR51X10038 (AP2639820) replaces 880036, AH303768, EA303768, PS303768, WR51X10051.