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Lennox G40UH-36A-070 Limit Switch
The main reason limit switches are made is because if the warmed air is too cool then the house will never get warm enough. The limit switch contains a sensor in the air handler that decides when the heated air is actually warm enough that it can be circulated throughout the house.
Major warnings of a laboring main limit switch
- The Lennox system begins to act differently on more than one occasion
- The heating and AC system will not even start or run well as it should
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Before buying or purchasing, do your due diligence and cross-check the correct model as well as make a visual comparison in order to be sure the correct replacement limit switch is being ordered. You do not need to install the replacement part alone. Search for a pro locally to do it for you.
Feel free to download your manual for help.
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