At what temperature should a vent safety switch on induce draft furnaces open?

The vent safety switch on induced draft furnaces is designed to monitor the temperature of the vent system to ensure safe operations. When the temperature reaches around 120°F, the safety switch activates to prevent overheating and potential hazards. This temperature setting is crucial because it provides a proper balance between allowing the furnace to operate efficiently while also ensuring that the exhaust system does not overheat, which could pose risks such as pipe damage or unsafe carbon monoxide emissions.

Setting the safety switch to open at this temperature helps protect the equipment and enhances safety for the occupants in the building by preventing critical failures. Understanding the operational parameters of safety devices like the vent safety switch is vital for maintaining safe and efficient HVAC systems.