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Lennox G40UH-24A-070 Limit Switch
The main reason limit switches are made is due to the fact that if the air inside the furnace is too cool the you will lose heat in the ducts and the vents will just blow cool air. A normal limit switch is a type of sensor switch in the heating area that determines if and when the air is warmed to a point to activate the main blower.
Key clues of a defective critical limit switch
- The system starts to run erratically on more than one occasion
- The heating and cooling system will not start or run longer than 30 seconds
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If you are going to be buying or ordering any Lennox G40UH-24A-070 part, do your due diligence and cross-check the correct model and also make a visual inspection so that you are positive that the correct limit switch is being ordered. There is no rule that says you have to install it yourself. Search for a pro locally to replace the part.
Feel free to download your manual for help.
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