543-056

Ensure the safety and efficiency of your heating system with this premium 3-inch High Limit Switch (L140-30F). Designed as a vital safety cut-out for gas furnaces and HVAC units, this limit control prevents overheating by monitoring the temperature within the heat exchanger. If the air temperature reaches the 140°F threshold, the switch automatically breaks the electrical circuit to shut down the burner, protecting your appliance from damage and ensuring home safety. Featuring a 30°F differential, it automatically resets once the system cools to a safe operating temperature. This reliable replacement part is essential for resolving common furnace issues such as short-cycling or the blower motor running continuously due to a tripped limit sensor.
Type: High Limit Control Switch
Size: 3-inch probe depth
Dimensions: 3 in
Application: Forced-air gas furnaces and HVAC heating systems requiring a fixed temperature limit control.
Specifications: Opening Temperature: 140°F; Temperature Differential: 30°F (Resets at 110°F); Normally Closed (NC) circuit configuration; 3-inch insertion depth.