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International Comfort Products T9MPD100J20C2 Furnace Door Switch
The furnace door switch is a safety switch which prevents the fan and gas ignition from switching on so as to avoid injuries. Do not try to fix it, just have it substituted for a new part at once if it is defective.
Warnings of a poorly working furnace door switch
- The whole system will not start even when you close the door
- The door mechanism looks as if it has been broken badly
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