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International Comfort Products NDP6125KJB1 Furnace Door Switch
The furnace door switch is a safety switch which blocks initial fan and ignitor being triggered to start so as to stop a potential explosion. It is quite important to have it traded for new one ASAP if you see that it is broken.
Warnings to watch for in a bad safety door switch
- The furnace will not operate whether the door is off or on
- The door mechanism looks like it is bent
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