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International Comfort Products NAC218AKA1 Furnace Door Switch
This switch blocks the draft inducer and gas ignition from turning on in order to prevent injury and fire. It is vital that this part be changed at once if you see that it is broken.
Major clues your safety switch on the furnace door is in need of replacing
- The door mechanism is beat up
- The furnace does not even thing about starting even when you close the door
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