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Lennox G40DF-48C-110 Limit Switch
A normal limit switch contains a sensor in the heat exchanger that can determine when the heated air is actually warm enough to activate the main blower. A limit switch was crafted due to the fact that if the air never warms up inside the exchanger then you will never get hot air through the ducts.
Hints critical limit switch will soon need to be replaced
- The Lennox system starts to run erratically repeatedly
- The heating and cooling system will not begin the ignition sequence or run like it is supposed to
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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 in order to be sure the correct replacement limit switch is the one being purchased. The installing of a new limit switch is a piece of cake if you have the know-how and have the tools to do it right.
Feel free to download your manual for help.
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