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International Comfort Products NHP224AKA1 Thermistor
A thermistor is a thermal resistor, that has a varied resistance that is contingent on the amount of, or lack thereof, heat. The furnace or AC reads the temperature in some specific areas of the system to know what to do next. They can tell the heating and cooling system when a certain temperature has been reached.
Key clues poorly running all-important thermister
- The main fan could refuse in its attempt to ramp up to full speed
- The initial sequence could never start up because of the failed thermistor
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