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International Comfort Products PHAD30N1K1 Furnace Door Switch
A furnace door switch is a safety feature that prevents the blower and ignition sequence from turning on so as to stop a potential explosion. You should have the switch be substituted for a new part swiftly if it is causing you problems.
Warnings of a failing furnace door switch
- The HVAC system does not run even with the door closed
- The furnace door switch seems to be breaking apart
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