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Carrier FX4BNF042000 Furnace Door Switch
The furnace door switch is a safety switch which inhibits the fan and gas ignition from starting in order to prevent injury and fire. Do not try to fix it, just have it swapped out promptly if you see that it is broken.
Important clues of a dying safety door switch
- The HVAC system will not begin whether the door is open or closed
- The safety door switch is eroded
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Before you decide on buying or purchasing any Carrier FX4BNF042000 replacement part, do your due diligence and cross-check the correct model as well as make a visual comparison so that you are positive that the proper replacement furnace door switch is the one being purchased. You do not have to install it yourself. Hire a pro in your community to hire and install the part for you.
Feel free to download your manual for help.
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