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International Comfort Products NBF100J20A1 Thermistor
In an HVAC system, a thermistor is a special kind of new age resistor that has a fluctuating resistance that is altered by the amount of, or lack thereof, heat. The control board interprets the temperature throughout the whole system to make a decision on what needs to be done. They can tell the circuit board when a temperature in increasing or decreasing.
Some warnings your thermister will not live much longer
- The system may never begin because of the malfunctioning thermistor
- Blower motor could fail in the attempt to get up to full speed
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