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International Comfort Products PHAD36N1K1 Furnace Door Switch
The job of the furnace door switch inhibits the fan and burner from switching on so as to stop a potential explosion. You should really have it swapped out immediately if you can, if you see that it is broken.
Signs of an unhealthy safety door switch
- The HVAC system cannot run with the door closed
- The door switch looks beat up
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