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Lennox G40DF-36A-070 Limit Switch
Limit switches are crucial because if the air is not warm enough then the house will never get warm enough. The limit switch has a sensor in the heat exchanger that makes the determination when the heated air is actually warm enough that it can be circulated throughout the house.
Simple indications of an inadequate limit switch
- The heating and cooling system will not start or run even though max temp has not been reached
- The HVAC system is starting to behave differently often
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If you are going to be buying or ordering do your best and make sure of the model number as well as make a visual inspection so that you are positive that the right limit switch is being ordered. If you are unsure about the installation of the limit switch by yourself then it may be wise to find a professional in your area to do the replacement of the part.
Feel free to download your manual for help.
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