543-175

Ensure the safety and efficiency of your home heating system with this professional-grade 3-inch furnace high limit switch. Designed as a critical safety component for residential gas and electric furnaces, this high-limit control monitors the internal temperature of the heat exchanger to prevent hazardous overheating. It acts as a thermal safeguard by automatically breaking the electrical circuit when the air temperature exceeds the designated limit, then resetting once the system has cooled sufficiently. This high-limit sensor is an essential replacement part for HVAC systems experiencing frequent cycling or safety-related shutdowns, ensuring reliable operation and peace of mind during the heating season.
Type: Furnace High Limit Control Switch
Size: 3-inch insertion depth
Dimensions: 3 inches (probe depth)
Application: Residential gas furnaces, electric heating systems, and HVAC blower assemblies where internal temperature monitoring is required for safety.
Specifications: Opening Temperature: 175°F; Closing Temperature: 145°F; Temperature Differential: 30°F; Reset Type: Automatic; Sensor Type: Bimetal Disc; Mounting: Flange.