122-433

This High Limit Control Switch is a vital safety component designed for HVAC systems, furnaces, and air handlers. As a fan-disc style thermal sensor, it monitors internal temperatures to prevent equipment overheating and potential damage. The switch functions by automatically breaking the electrical circuit when the temperature reaches its designated high-limit threshold of 140°F and features a 30°F differential for resetting. Ideal for residential and commercial heating repairs, this switch ensures your furnace operates within safe thermal parameters. If your heating system is short-cycling or failing to activate, replacing a worn or faulty high-limit switch is essential for restoring reliable performance and maintaining household safety.
Type: Fan Disc High Limit Control Switch
Size: Small
Application: Used in residential and commercial furnaces, air handlers, and forced-air heating systems to monitor temperature and provide high-limit safety protection.
Specifications: Cut-out temperature: 140°F; Differential: 30°F; Switch type: Normally closed, opens on temperature rise.