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International Comfort Products NDN5125BKC1 Furnace Door Switch
A furnace door switch is a safety feature that stops the fan and ignitor from activating in order to prevent injury and fire. You should really have it exchanged for a new one at once especially if you think it is defective.
Major red flags the switch on your furnace door needs to be replaced
- The HVAC system does not turn on even with the door closed
- The safety door switch seems to be broken badly
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