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Carrier FF1DNA030000AAAA Furnace Door Switch
A furnace door switch is a switch that prevents the blower and burner from activating so as to avoid injuries. It is imperative that the switch be changed at once if you find it to be faulty.
Important red flags of a dying switch on the furnace door
- The switch seems to be worn
- The HVAC system does not run even when you close the door
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