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International Comfort Products HAC424GKA4 Furnace Door Switch
The furnace door switch is a safety switch which prevents the blower and gas ignition from turning on so as to stop a potential explosion. You should have the switch be switched out quickly if you suspect that it is not working.
Simple signals your safety switch on the furnace door has very little life left
- The system does not begin to work even when you close the door
- The door mechanism appears as though it has been chipped
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