Lennox 78L29 Manual Reset Limit Switch Cut Out 250°F

The Lennox 78L29 Manual Reset Limit Switch is a temperature-sensitive safety to prevent overheating in HVAC systems. It will open at 250°F, and the electric circuit will be opened when the temperature goes beyond the set point. This is fitted in the heat section of the system, and it should be manually turned off after being turned on to normal operation. It allows lowering excessive temperatures and protecting the parts, which means safe operation and high efficiency of furnaces, boilers, and other gas-fired HVAC applications.