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Carrier 38HDF018 Limit Switch
The limit switch has a sensor located in the furnace that determines when the air is warmed to a point for the main blower to kick in and circulate the air. Limit switches are built because if the air never warms up the you will lose heat in the ducts and the vents will just blow cool air.
Major symptoms main limit switch will not live much longer
- Your Carrier system will not begin the ignition sequence nor will it stay running longer than 10 minutes
- The Carrier system is beginning to shut down unexpectedly on a regular basis
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Before you decide on buying or purchasing any Carrier 38HDF018 part do your best and make sure of the model number as well as make a visual inspection in order to be sure the correct limit switch is the one being purchased. You do not need to install the part by yourself. Search for a pro in your area to do it for you.
Feel free to download your manual for help.
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