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Carrier 42D Limit Switch
The reason limit switches exist is due to the fact that if the air inside the furnace is too cool the you will lose heat in the ducts and the vents will just blow cool air. A normal limit switch contains a sensor located in the furnace that determines when the heated air is warm enough for the blower to be activated.
What are some hints that my chief limit switch has to be replaced?
- The whole system is starting to become unpredictable time after time
- Your Carrier system refuses to kick in or run well for any significant length if time
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If you decide on picking up or ordering, do your due diligence and cross-check the correct model as well as make a visual inspection so that you are positive that the correct replacement limit switch is the one being purchased. There is no rule that says you have to install the replacement part alone. Search for a pro in your area to replace the part.
Feel free to download your manual for help.
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