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Carrier 39LB Thermistor
A very basic thermistor is a special kind of new age resistor that has a varied resistance that changes as it depends on heat. The heating system must know the temp throughout the whole system to know what to do next. They can tell the main board when the temperature has been reached.
Clues to watch for to know your thermister will need replacing
- Main blower could never begin in the attempt to engage full speed spinning
- The system may not initiate the starting sequence due to a thermistor that is damaged
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Before you decide on buying or ordering any Carrier 39LB replacement part do your best and make sure of the model number as well as make a visual comparison so that you are positive that the right thermistor is being ordered. If you are not sure about the installation of the new thermistor by yourself then it is probably best to find a professional in your area to do the replacement of the part.
Feel free to download your manual for help.
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