Description
The International Comfort Products 1171901 L150-55 auto limit switch is a temperature-actuated safety control used in compatible gas furnace HVAC systems to monitor heat exchanger or discharge air temperature and interrupt system operation when preset limits are reached. It is installed on the furnace cabinet or heat exchanger area, where it responds to elevated temperatures by opening or closing an electrical control circuit connected to the furnace control board. As part of the safety control system, it works in coordination with components such as the blower motor, gas valve, and ignition to manage heating cycle operation.
