The Thermal Cut Off is an OEM part for Frigidaire microwaves. It is located inside the microwave cavity or near the magnetron tube. It is designed to monitor the temperature and interrupt the electrical current if it exceeds a safe limit. This prevents the microwave from overheating and potentially causing damage or hazards. Causes of a faulty or damaged thermal cut off can include regular wear and tear, electrical malfunctions, or overheating due to excessive use or blocked airflow. These factors can result in issues such as the microwave not heating food properly, frequent shutdowns during operation, or complete failure to function. Symptoms of a bad thermal cut off may include: The microwave not generating heat The microwave turning off abruptly during operation The microwave not starting or experiencing intermittent operation This OEM Frigidaire part can also be used on Electrolux, Frigidaire, Gibson, Kelvinator, Westinghouse, and Sears/Kenmore.5304509475 (AP6230622) replaces 5304464094, 4583663, PS12071310.