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International Comfort Products NDN6125KJG1 Thermistor
A thermistor is a specific kind of resistor which has a resistance that varies depending on the thermal temperature. The furnace or AC must know the temp throughout the whole system to know what to do next. They tell the circuit board when the temperature in increasing or decreasing.
Important clues of an inadequate all-important thermister
- The AC and heat system could never start up depending on which is the thermistor that is stuck open
- The system blower could fail in its attempt to begin full speed blowing
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