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International Comfort Products GNL125N20C3 Thermistor
In an HVAC system, a thermistor is a certain type of resistor that has a fluctuating resistance that varies depending on the temperature. They notify the main board when the temperature in increasing or decreasing. The heating system needs to know the temperature in certain areas to understand what is going on.
Some clues the system thermister is in dire need of a replacement
- The blower could refuse in its attempt to ramp up the airflow
- The whole HVAC system could possibly not even begin because of any bad thermistor
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