543-023

Ensure the safety and efficiency of your heating system with this professional-grade furnace high limit switch. Designed as a critical safety component for forced-air gas furnaces and HVAC units, this thermal limit control prevents equipment damage by monitoring heat exchanger temperatures. If the system reaches an unsafe temperature, the switch automatically opens the circuit to shut down the heating element or gas valve, protecting your home and appliance from overheating. This high-limit sensor features a 3-inch insertion probe and is calibrated to trip at 250°F with a 30°F reset differential, making it an essential replacement part for restoring reliable climate control and system performance.
Type: Furnace High Limit Control Switch
Size: 3-inch probe length
Dimensions: 3 inches × Not specified × Not specified
Application: Used in residential gas furnaces, forced-air heating systems, and HVAC equipment as a primary safety limit to prevent heat exchanger overheating.
Specifications: Cut-out temperature: 250°F; Differential: 30°F (closes at 220°F); Circuit: Normally Closed (NC); Component type: 3-inch insertion thermostatic disc switch.