The Defrost Heater Assembly is an OEM replacement part for GE refrigerators. It contains the heating element responsible for maintaining optimal temperatures within the refrigerator. As a crucial component, the heater works to keep stored food safely cooled and prevent freezing. Causes of a bad defrost heater can include gradual wear over time, mineral buildup reducing heat transfer efficiency, and physical damage.  Symptoms of failure are: Fluctuating temperatures inside the fridge Food spoiling more quickly  Compressor running excessively  Error codes indicating heating issues This GE OEM part is also compatible with Hotpoint, RCA, and Kenmore models for simple cross-referencing.WR51X10108 (AP4510576) replaces 1567700, AH2374788, EA2374788, PS2374788.