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Haier HPN14XHM Furnace Door Switch
A furnace door switch is a safety feature that stops initial fan and gas ignition from activating so as to avoid injuries. Do not try to fix it, just have it swapped out promptly if it is defective.
Important red flags to watch for in a failing safety furnace door switch
- The HVAC system will not fire up even with the door closed
- The safety door switch appears to be breaking apart
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