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Samsung MH052FECA Furnace Door Switch
The furnace door switch is a safety switch which inhibits initial fan and gas ignition being triggered to start so as to stop a potential explosion. It is imperative that the switch be substituted for a new part at once especially if you think it is defective.
Signs of a barely functioning safety furnace door switch
- The door switch looks eroded
- The HVAC system does not function even with the door closed
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