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International Comfort Products NDC7125BKA3 Furnace Door Switch
The furnace door switch blocks the fan and gas ignition from activating so as to stop a potential explosion. Do not try to fix it, just have it exchanged for a new one immediately if you can, especially if you think it is defective.
Signals the switch on your furnace door needs replacing ASAP
- The door mechanism looks stuck
- The whole system will not even begin to start whether the door is off or on
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