543-220

Ensure the safety and efficiency of your forced-air heating system with this premium 3-inch high limit switch. Designed as a critical safety component for residential furnaces and HVAC units, this thermal limit control prevents the heat exchanger from overheating by automatically interrupting power if internal temperatures exceed safe operating limits. It features a specific 'Open on Rise' temperature threshold to provide reliable protection against restricted airflow, clogged filters, or blower motor failure. Whether you are performing routine maintenance or repairing a malfunctioning heating system, this durable sensor is essential for maintaining optimal indoor climate control and protecting your appliance from potential heat damage.
Type: High Limit Control Switch
Size: 3-inch probe
Dimensions: 3 in
Application: Gas furnaces, electric furnaces, and forced-air heating systems.
Specifications: Cut-out Temperature: 220°F; Differential: 40°F; Configuration: Normally Closed (NC); Function: Opens on temperature rise to prevent overheating.