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International Comfort Products NAC260AKA1 Furnace Door Switch
The furnace door switch is a safety switch which blocks the fan and burner from starting so as to stop a potential explosion. Do not waste time and have it changed ASAP if you see that it is broken.
Red flags of a deteriorating switch on the furnace door
- The safety door switch appears as though it has been worn down
- The system will not fire up with the door closed
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