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Carrier 25HPA518A0030010 Thermistor
A very basic thermistor is a certain type of resistor that has a swinging resistance is directly proportioned to temperature at its location. They tell the HVAC system when a temperature reaches a certain point. The furnace or AC interprets the temperature in certain areas to know what to do next.
Major signs the Carrier thermister is in need of replacing
- The heating and AC system may not even start because of any damaged thermistor
- Primary blower fails in its attempt to ramp up to full speed
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