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Lennox HP13-036 Furnace Door Switch
The furnace door switch inhibits the fan and gas ignition from switching on in order to prevent injury and fire. You should really have it substituted for a new part swiftly especially if you suspect it is not working properly.
Symptoms of a poorly working safety switch on the furnace door
- The door switch appears as though it has been breaking off
- The furnace cannot run whether the door is open or closed
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