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Carrier 39LB Limit Switch
The reason limit switches exist is because if the air is too cool inside the furnace to begin with, then you will never get hot air through the ducts. A normal limit switch has a sensor located in the furnace that makes the determination when the air is actually warm enough to activate the main blower.
Major symptoms main limit switch is failing
- The whole system is starting to runs uneven from time to time
- Your Carrier system will not initiate nor will it stay running as it should
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Before buying or ordering, do your due diligence and cross-check the model number and also make a visual inspection so that you are positive that the correct replacement limit switch is the one being purchased. The installing of a new limit switch can be quite easy assuming you energy and have the tools to do it right.
Feel free to download your manual for help.
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