543-006

Ensure your heating system operates safely and efficiently with this professional-grade high limit control switch. Designed as a critical safety component for forced-air furnaces and HVAC units, this thermal sensor monitors the temperature of the heat exchanger to prevent overheating. It is engineered to automatically interrupt the electrical circuit if internal temperatures exceed the safe operating threshold, protecting your equipment from damage and ensuring home safety. Once the system cools by a specific temperature differential, the switch resets to allow for normal operation. This reliable replacement part is essential for troubleshooting furnace short-cycling or thermal cutout issues, providing long-lasting durability for seasonal maintenance and repairs.
Type: High Limit Control Switch
Size: 3-inch probe depth
Dimensions: 3 in
Application: Used in residential and commercial gas and electric furnaces, air handlers, and heating systems to provide thermal protection and prevent heat exchanger overheating.
Specifications: Temperature Rating: Opens at 180°F, Closes at 150°F (30°F differential); Circuit: Normally Closed (NC); Mounting style: Flange mount with 3-inch insertion probe.