The Magnetron Thermostat is an OEM part for LG microwaves and built-in ranges. Its primary function is to monitor the temperature and ensure that it remains within a safe operating range. If the temperature exceeds the preset limit, the thermostat will interrupt the power supply to the magnetron, preventing overheating and potential damage. Causes of a faulty magnetron thermostat can include electrical malfunctions, component failures, or physical damage. These factors can result in issues such as erratic heating, microwave not heating properly, or the appliance shutting off unexpectedly. Symptoms of a bad magnetron thermostat may include: Microwave not heating food evenly or at all Inconsistent or weak heating performance Microwave shutting off or displaying error codes related to temperature issues This OEM LG part can also be used on Kenmore/Sears appliances. This part fixes the following symptomsNo heatWon't startnot self-cleaning6930W1A003X (AP4443816) replaces 1365203, AH3530468, EA3530468, PS3530468.