543-235

Ensure the safety and efficiency of your heating system with this professional-grade 3-inch high limit control switch. As a vital safety component for residential furnaces and HVAC units, this sensor monitors internal temperatures to prevent the appliance from overheating. The switch is designed to automatically interrupt the heating cycle if the temperature exceeds a specific safety threshold, protecting your equipment from potential damage and ensuring a safe operating environment. Perfect for HVAC repairs and preventative maintenance, this thermal limit control is built for reliability and long-lasting performance in forced-air heating systems. Its standard 3-inch profile allows for precise heat detection within the plenum, making it an essential replacement part for maintaining optimal furnace functionality and home safety.
Type: High Limit Control Switch
Size: 3-inch
Dimensions: 3 in
Application: Used primarily in gas and electric furnaces, HVAC systems, and forced-air heating units to monitor plenum temperature and provide over-temperature protection.
Specifications: Switching Logic: Normally Closed (NC); Open Temperature: 240°F; Close Temperature: 200°F (40°F Differential); Mounting: 3-inch insertion depth; Function: Opens on temperature rise for safety shutdown.