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Carrier 50XL-A30 Furnace Door Switch
A furnace door switch is a switch that blocks the vent fan and other risky devices being triggered to start so as to avoid injuries. It is quite important to have it switched out immediately if you can, if it is defective.
Some warnings of an ailing safety switch on the furnace door
- The furnace door switch looks as if it has been broken completely
- The whole system will not start whether the door is open or closed
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