limit switch

Furnace Safety Switches Save Lives (And Shut Down Furnaces)

Three Furnace Safety Switches

Furnaces are remarkable pieces of equipment. If you want heat, you simply set the thermostat to “heat,” push the dial to the desired temperature, and voila! There’s warm air flowing throughout the home. When you set the thermostat to heat, an electric signal is sent to your furnace’s control circuit, which turns on the ignition

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