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Carrier 38TDB048 Thermistor
A very basic thermistor is a thermal resistor, which has a resistance that is altered by heat. The furnace or AC needs to know the temperature in order to make sure everything is running smoothly. They tell the circuit board when the temperature has been reached.
Easy warnings of an ailing Carrier thermister
- The heating and cooling system could never start up because of the problematic thermistor
- The blower could possibly fail in the attempt to ramp up the airflow
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