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Payne PH3ZNA036000AA Furnace Door Switch
The job of the furnace door switch prevents the draft inducer and ignitor from switching on so as to stop a potential explosion. Do not try to fix it, just have it traded for new one as quick as you can if you suspect that it is not working.
Simple indications to watch for in a bad furnace door switch
- The door switch seems wrong
- The system does not fire up even when you close the door
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