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Lennox CB30U-51 Limit Switch
The limit switch is a type of sensor switch in the heat exchanger that can determine when the heated air is warm enough for the blower to be activated. Limit switches are crucial because if the warmed air is too cool the you will lose all the heat as the air flows through the ducts.
Simple indications of a defective main limit switch
- System will not even start or run longer than a minute
- The HVAC system is starting to act weird on more than one occasion
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If you are going to be buying or ordering do your best and make sure of the correct model and also make a visual comparison so that you are positive that the right limit switch is being ordered. You do not need to replace the part all by yourself. Look for a professional in your area to do it for you.
Feel free to download your manual for help.
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