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SPT WA-8070E Thermistor
In an HVAC system, a thermistor is a specific kind of resistor which has a resistance that changes as it depends on heat. They can tell the system control board when the temperature reaches a certain point. The furnace or AC needs to know the temperature in certain areas to make sure everything is running smoothly.
Major warnings your all-important thermister needs replacing ASAP
- Blower fan fails in its attempt to ramp up the airflow
- The whole HVAC system may never start up due to a stuck thermistor
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