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International Comfort Products H8DNL075B12B1 Thermistor
A thermistor is a certain type of resistor that has a varied resistance that is directly proportioned to the amount of, or lack thereof, heat. They can tell the system control board when the temperature reaches a certain point. The furnace or AC takes the temperature in order to do its job correctly.
Clues to watch for to know your all-important thermister is in dire straights
- The heating and cooling system could never start up because of any malfunctioning thermistor
- The main blower could possibly fail to begin to engage full speed spinning
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