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Samsung AQB24J2WC Thermistor
In an HVAC system, a thermistor is a thermal resistor, that has a fluctuating resistance that is solely dependent on the amount of, or lack thereof, heat. The furnace or AC needs to know the temperature throughout the whole system to understand what is going on. They notify the system control board when a certain temperature reaches a certain point.
Indications of a faulty system thermister
- The main fan could never begin in the attempt to ramp up to full speed
- The whole system could possibly not even begin because of any thermistor that is damaged
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