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International Comfort Products PGMD48G0904 Furnace Door Switch
The furnace door switch blocks the draft inducer and gas ignition from turning on in order to prevent injury and fire. It is quite important to have it exchanged for a new one immediately if you can, if you see that it is broken.
Symptoms of a weakening safety furnace door switch
- The HVAC system does not even thing about starting whether the door is open or closed
- The door switch seems chipped
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