543-205

The 3" High Limit Switch L205-30F is a vital safety component engineered for modern heating systems and residential furnaces. This thermal sensor acts as a fail-safe by monitoring internal temperatures within the heat exchanger. Designed to protect your HVAC equipment from overheating, the switch automatically opens the circuit when the temperature reaches 205°F and resets once it cools down by 30°F. If your furnace blower runs continuously or the burner fails to ignite, a faulty limit control switch may be the cause. This high-quality replacement part ensures your heating unit operates within safe thermal parameters, extending the lifespan of your appliance and maintaining home safety.
Type: HVAC High Limit Control Switch
Size: 3-inch insertion depth
Dimensions: 3 in
Application: Used in forced-air gas furnaces, air handlers, and various residential heating systems to monitor heat exchanger temperatures and provide thermal protection.
Specifications: Temperature Rating: Opens at 205°F, Closes at 175°F (30°F Differential); Configuration: Normally Closed (NC); Mounting style: Flange-mount for duct or cabinet installation.