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Lennox G40DF Furnace Door Switch
This switch blocks initial fan and burner from starting in order to prevent injury and fire. Do not try to fix it, just have it substituted for a new part quickly if you find it to be faulty.
Major signs the switch on your furnace door is in dire need of a replacement
- The HVAC system cannot run whether the door is open or closed
- The door mechanism looks wrong
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If you are going to be buying or ordering, do your due diligence and cross-check the correct model as well as make a visual comparison so that you are positive that the correct replacement furnace door switch is the one being purchased. If you are unsure about the installation of the furnace door switch on your own then it may be wise to find a professional in your area to do the work for you.
Feel free to download your manual for help.
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