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Lennox CB30M-31 Furnace Door Switch
This switch inhibits initial fan and other risky devices being triggered to start so as to stop a potential explosion. You should really have it substituted for a new part at once if it is defective in some way or another.
Some warnings your furnace door switch is on its last leg
- The furnace door switch looks like it is broken completely
- The whole system does not run whether the door is open or closed
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Before buying or ordering any Lennox CB30M-31 replacement part do your best and double check the correct model and also make a visual inspection in order to be sure the correct furnace door switch is the one being purchased. Use caution when replacing parts in an HVAC environment. If you are not sure what to do then call a pro. Don't be sorry. Be safe.
Feel free to download your manual for help.
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