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International Comfort Products NAC224GKA1 Furnace Door Switch
This switch inhibits initial fan and ignition sequence being triggered to start so as to avoid injuries. Do not waste time and have it exchanged for a new one quickly if it is defective in some way or another.
Red flags to watch for in a bad safety switch on the furnace door
- The whole system will not fire up even when you close the door
- The door mechanism seems to be breaking apart
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