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Carrier 38CKC042 Thermistor
A thermistor is a specific kind of resistor whose rated resistance varies depending on the amount of, or lack thereof, heat. They inform the main board when a certain temperature in increasing or decreasing. The furnace or AC needs to know the temperature in order to know what to do next.
Signals of a weak temp regulating thermister
- The system could possibly never start due to any one failed thermistor
- The main fan could possibly fail to begin to engage full speed
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