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Mitsubishi MUY-GE09NA Furnace Door Switch
The furnace door switch is a safety switch which inhibits the blower and ignition sequence being triggered to start so as to avoid injuries. It is important to get the part traded for new one as quick as you can especially if you suspect it is not working properly.
Major signs your furnace door switch has very little life left
- The switch is breaking off
- The whole system does not function even when you close the door
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