The Thermostat is an OEM part for Samsung microwaves. It monitors and regulates the internal temperature of the microwave, ensuring it operates within safe and efficient parameters. By maintaining the correct temperature, the thermostat helps prevent overheating and potential damage to other components. Causes of a bad thermostat can include electrical failures, wear and tear from regular use, or damage from power surges. Prolonged exposure to high temperatures can also degrade the thermostat over time. Symptoms of a bad thermostat include: The microwave not heating food properly The unit shutting off unexpectedly during operation Unusual temperature fluctuations inside the microwave The microwave not turning on at all This OEM Samsung part is designed to fit a range of Samsung microwave models, ensuring reliable temperature regulation and overall appliance performance.This part fixes the following symptomsWon't startDE47-20059B (AP4580112) replaces 2079767, DE47-20059A, PS4226453.