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Payne PH1ZNA024000AAAA Furnace Door Switch
The furnace door switch is a safety switch which prevents the draft inducer and ignitor being triggered to start so as to avoid injuries. It is quite important to have it substituted for a new part immediately if you can, if you see that it is broken.
Clues to watch for to know the safety door switch is failing
- The safety door switch seems to be chipped
- The whole system does not fire up whether the door is off or on
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