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Lennox HP40-048 Limit Switch
The limit switch is a type of sensor switch in the air handler that decides if and when the air is warmed to a point for the blower to be activated. The reason limit switches exist is because if the air is not warm enough then the house will never get warm enough.
Red flags of a poorly working limit switch
- The heating and AC system refuses to start or continue to run like it ought to
- The system is starting to initiate and then stops often
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If you are going to be buying or ordering any Lennox HP40-048 part, do your due diligence and cross-check the model number as well as make a visual comparison in order to be sure the correct replacement limit switch is being ordered. There is no rule that says you have to install the part by yourself. Look for a professional locally to do the job for you.
Feel free to download your manual for help.
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