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Carrier FX4CNF018000 Limit Switch
The limit switch is a type of sensor switch in the air handler that determines when the heated air is warm enough for the main blower to kick in and circulate the air. The reason limit switches exist is because if the air is too cool inside the furnace to begin with, the you will lose all the heat as the air flows through the ducts.
What are the clues to watch out for to know my main limit switch is almost dead?
- The system starts to stop suddenly time after time
- Your Carrier system will not initiate or continue to run longer than 10 minutes
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Before buying or purchasing any Carrier FX4CNF018000 replacement part do your best and cross-check the correct model and also make a visual comparison in order to be sure the proper replacement limit switch is the one being purchased. Installation of a new limit switch is a breeze if you have the know-how and have the tools to do it right.
Feel free to download your manual for help.
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