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Whynter ARC-14SH Furnace Door Switch
This switch blocks the draft inducer and burner from activating so as to stop a potential explosion. It is extremely important that the device is replaced promptly if you see that it is broken.
Major signs of a faulty safety switch on the furnace door
- The door mechanism looks as if it has been broken badly
- The furnace does not fire up whether the door is open or closed
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