The Marley Engineered Products 4520-2024-000 L120-25F Limit Switch is a temperature-sensitive safety component designed for compatible electric unit heaters and heating equipment. It monitors operating temperature and switches the electrical circuit according to its preset temperature limit, helping prevent excessive heat buildup. This replacement switch supports safe heater operation... https://www.partshnc.com/4520-2024-000-marley-engineered-products-l120-25f-limit-switch