Specially designed for furnaces fan systems, this furnaces temperature limiter will automatically disconnect its contacts when the temperature rises to 250℉, effectively overheating and maintaining normal operate of the furnaces body. The manual reset design enhances both and equipment maintainability. Make of metal, it has high temperature resistance and resistance, ensuring a long service life. This switches, with excellent sensitivity and precisely, can achieve precise temperature detection and timely . Easy installation: Simply use basic tools (not included) to remove the old switches, then install the limit switches face up and connecting the wires correctly.