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International Comfort Products NTC5125BKD1 Thermistor
In an HVAC system, a thermistor is a special kind of new age resistor whose resistance is solely dependent on the amount of, or lack thereof, heat. They tell the main board when the temperature has been reached. The control board interprets the temperature throughout the whole system to know what to do next.
Major indications your all-important thermister will not last the year
- Main blower could refuse to begin to ramp up to full speed
- The initial sequence could possibly not even begin because of the thermistor that is the problematic one
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