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Lennox XC21-024 Limit Switch
A normal limit switch is a switch in the heat exchanger that makes the determination when the heated air is actually warm enough for the blower to be activated. The reason limit switches exist is because if the air is not warm enough then you will never get hot air through the ducts.
How do you know if your limit switch most likely is dying?
- The HVAC system will not begin nor will it stay running like it should
- The Lennox system is beginning to ramp up but then stops occasionally
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If you are going to be buying or purchasing any Lennox XC21-024 replacement part, do your due diligence and make sure of the correct model as well as make a visual comparison in order to be sure the right limit switch is the one being purchased. You do not need to install it yourself. Search for a pro in your area to hire and install the part for you.
Feel free to download your manual for help.
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