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Lennox XC21-036 Limit Switch
A normal limit switch is a switch located in the furnace that senses, or governs, when the heated air is warmed to a point to activate the main blower. The main reason limit switches are made is because if the air is too cool inside the furnace to begin with, then the house will never get warm enough.
Subtle cues of a dying main limit switch
- The system is beginning to shut down unexpectedly more often than not
- System refuses to kick in or run well longer that five minutes
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If you decide on picking up or ordering any Lennox XC21-036 replacement part, do your due diligence and cross-check the correct model as well as make a visual inspection so that you are positive that the correct replacement limit switch is being ordered. You do not need to install it yourself. Hire someone with experience in your area to hire and install the part for you.
Feel free to download your manual for help.
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