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Lennox G40UH-36A-070X Limit Switch
The limit switch is a type of sensor switch in the heat exchanger that makes the determination when the heated air is actually warm enough for the air to begin normal home circulation. Limit switches are built because if the warmed air is too cool the you will lose heat in the ducts and the vents will just blow cool air.
General warnings of a defective main limit switch
- The HVAC system will not begin the ignition sequence or continue to run even though max temp has not been reached
- The Lennox system is beginning to run erratically often
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If you decide on picking up or purchasing any Lennox G40UH-36A-070X replacement part do your best and double check the model number as well as make a visual inspection so that you are positive that the correct limit switch is the one being purchased. You do not need to install the replacement part alone. Find a professional locally to do the job for you.
Feel free to download your manual for help.
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