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Carrier 25HNA924A0030030 Limit Switch
A normal limit switch is a type of sensor switch in the heat exchanger that determines if and when the air is warmed to a point for the blower to be activated. This is important because if the air is too cool inside the furnace to begin with, the you will lose heat in the ducts and the vents will just blow cool air.
Chief elements of a dying limit switch
- The heating and cooling system will not begin nor will it stay running even though the desired temperature has not been attained
- The HVAC system starts to shut down unexpectedly frequently
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If you are going to be buying or purchasing do your best and cross-check the model number and also make a visual inspection in order to be sure the proper replacement limit switch is the one being purchased. You do not have to install it yourself. Find a professional in your community to pay to install it for you.
Feel free to download your manual for help.
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