060-528

Ensure the safety and efficiency of your heating system with the L155F-40 High Limit Switch. This essential HVAC fan disc thermostat acts as a critical safety sensor, monitoring the internal temperature of your furnace's heat exchanger. Designed to prevent overheating, this thermal limit control automatically opens to shut down the heating element or burner if the temperature reaches the 155°F limit. Once the unit cools down by the 40°F differential—resetting at 115°F—the switch closes to allow normal operation. Ideal for gas and electric forced-air furnaces, this high-limit switch is a necessary replacement part for troubleshooting short-cycling issues or failed ignition cycles caused by faulty thermal sensors. Its durable construction ensures long-lasting performance and reliable temperature regulation for residential heating equipment.
Type: Fan Disc High Limit Control Switch
Application: Used as a safety cutout or temperature regulator in forced-air furnaces, gas heaters, and electric heating systems.
Specifications: Open Temperature: 155°F; Close Temperature: 115°F (40°F Differential); Switch Configuration: Normally Closed (NC); Sensor Type: Bimetal Disc.