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International Comfort Products H9MPD080J16A2 Furnace Door Switch
The furnace door switch is a safety switch which inhibits the vent fan and ignition sequence being triggered to start so as to stop a potential explosion. Do not try to fix it, just have it exchanged for a new one quickly if it is defective.
Major symptoms of a poorly performing safety door switch
- The switch seems bent badly
- The furnace does not even thing about starting even when you close the door
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