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Carrier 48GP030040300 Thermistor
A thermistor is a specific kind of resistor that has a fluctuating resistance that is contingent on the actual temperature is perceives. The system control board needs to know the temperature in some specific areas of the system to be sure everything is going well. They tell the system control board when the temperature has been reached.
Major symptoms the system thermister needs to be replaced
- The main fan could fail in its attempt to ramp up
- The system may not function because of any thermistor that is stuck open
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