021-773

This professional-grade SPDT (Single Pole Double Throw) limit switch is a vital safety component for HVAC systems and forced-air heating appliances. Designed as an auto-reset high limit control, it monitors internal temperatures to prevent equipment overheating and potential thermal damage. The switch is engineered with an L150-40F thermal profile, meaning it activates at 150°F and automatically resets once the temperature drops by 40°F. This fan disc style controller is a common solution for furnace repair and climate control maintenance, ensuring the appliance operates within safe parameters by either cutting power to heating elements or activating a cooling fan. Its SPDT configuration allows for versatile wiring options, making it an essential part for maintaining system reliability and household safety.
Type: Fan Disc High Limit Control Switch
Size: Compact
Application: Used as a safety limit or fan control in furnaces, air handlers, unit heaters, and various HVAC heating equipment.
Specifications: Circuit: SPDT (Single Pole Double Throw); Reset Type: Automatic; Open Temperature: 150°F; Differential: 40°F; Style: Disc Type