543-005

Ensure the safety and efficiency of your heating system with this 3-inch furnace high limit switch. Designed as a critical thermal protection component for residential gas furnaces and HVAC units, this high limit control monitors the temperature of the heat exchanger. It acts as a safety cutout, automatically interrupting the heating cycle if the internal temperature reaches 220°F to prevent overheating and potential equipment damage. Once the temperature drops by 30°F, the switch resets to resume normal operation. This reliable replacement sensor is essential for troubleshooting furnace short-cycling or safety shutdown issues, providing peace of mind and maintaining optimal climate control performance in forced-air systems.
Type: HVAC High Limit Safety Switch
Size: 3-inch insertion depth
Dimensions: 3 in
Application: Primarily used in residential gas furnaces and forced-air heating equipment to prevent heat exchanger overheating.
Specifications: Cut-out Temperature: 220°F; Differential (Cut-in): 30°F; Switch Type: Normally Closed (NC); Reset Type: Automatic