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Carrier 40MFC012 Furnace Door Switch
The furnace door switch is a safety switch which inhibits the blower and other risky devices from starting so as to stop a potential explosion. It is vital that this part be swapped out promptly if you find it to be faulty.
Hints to watch for in a failing safety door switch
- The door switch looks like it is removed
- The system will not even begin to start whether the door is off or on
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Before buying or purchasing do your best and cross-check the correct model as well as make a visual inspection in order to be sure the right furnace door switch is the one being purchased. There is no need to replace the part all by yourself. Look for a professional in your community to hire and install the part for you.
Feel free to download your manual for help.
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