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Goodman ARUF364216CA Furnace Door Switch
The job of the furnace door switch blocks the draft inducer and ignition sequence from activating so as to stop a potential explosion. You should really have it swapped out at once if it is causing you problems.
Some clues of a weakening safety door switch
- The switch looks as if it has been wrong
- The furnace does not begin to work whether the door is off or on
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