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International Comfort Products GDL125N20A1 Thermistor
A thermistor is a certain type of resistor that has a varied resistance that is governed by thermal temperature. The furnace or AC needs to know the temperature in certain areas to make sure everything is running smoothly. They tell the HVAC system when the temperature in increasing or decreasing.
Signs your thermister has to be replaced
- The main blower could never begin to begin to ramp up to full speed
- The system could possibly never start due to a thermistor that has failed
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