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Carrier 25HPA530H0030010 Furnace Door Switch
A furnace door switch is a switch that blocks initial fan and ignitor being triggered to start so as to stop a potential explosion. You should really have it swapped out immediately if you can, if you find it to be faulty.
Subtle hints your furnace door switch will have to be replaced
- The safety door switch is damaged
- The system does not function with the door closed
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