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Carrier 42C Limit Switch
A normal limit switch is a switch in the air handler that makes the determination when the heated air is actually warm enough to activate the main blower. This is important due to the fact that if the air inside the furnace is too cool then you will never get hot air through the ducts.
Key clues of a faulty critical limit switch
- The heating and AC system refuses to start or run well longer than a minute
- The Carrier system begins to runs spotty on more than one occasion
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If you decide on picking up or purchasing do your best and cross-check the model number as well as make a visual comparison in order to be sure the right limit switch is the one being purchased. Use caution when installing or replacing an HVAC part. If you are unsure about the installation then you should call a pro. Stay safe.
Feel free to download your manual for help.
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