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Dometic 630516 Furnace Door Switch
This switch blocks the fan and gas ignition being triggered to start so as to stop a potential explosion. It is imperative that the switch be traded for new one ASAP if you suspect that it is not working.
Some clues the switch on your furnace door needs replacing ASAP
- The HVAC system does not operate even with the door closed
- The switch appears to be eroded
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