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 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 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 The manual reset design enhances both and equipment maintainability