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International Comfort Products H9MPD125L20C1 Furnace Door Switch
The furnace door switch is a safety switch which prevents initial fan and ignitor from switching on so as to avoid injuries. It is imperative that the switch be changed immediately if you can, if it is causing you problems.
Key signs of a faulty safety door switch
- The safety door switch appears to be messed up
- The system will not fire up even when you close the door
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