The Thermostat is an OEM part for GE microwaves. This thermostat maintains safe operating temperatures by monitoring the internal heat levels and regulating the microwave's heating elements.   Causes of a bad thermostat can include electrical issues, repeated heating cycles leading to wear and tear, or damage from power surges.   Symptoms of a bad thermostat include: The microwave not heating properly The microwave shutting off unexpectedly during operation Error codes or warning signals related to temperature issues The microwave not starting at all This GE replacement part is also compatible with Hotpoint, RCA, and some Kenmore models.WB24X10163 (AP4339925) replaces 1473862, AH2321377, EA2321377, PS2321377.