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International Comfort Products PA5536AKA1 Furnace Door Switch
The furnace door switch is a safety switch which blocks the fan and ignition sequence from activating so as to stop a potential explosion. You should have the switch be switched out immediately if you can, especially if you think it is defective.
Indications the safety door switch needs replacing ASAP
- The HVAC system cannot run even when you close the door
- The switch looks as if it has been messed up
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