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Payne PH1ZNA036000AAAA Furnace Door Switch
The job of the furnace door switch inhibits the draft inducer and ignitor from activating so as to stop a potential explosion. Do not try to fix it, just have it changed promptly especially if you think it is defective.
Major warnings of an inadequate safety door switch
- The door mechanism looks worn
- The whole system does not fire up with the door closed
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