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International Comfort Products NBF125J20A1 Thermistor
In an HVAC system, a thermistor is a special kind of new age resistor that has a swinging resistance is directly proportioned to temperature. They inform the system when the temperature has been reached. The main control board reads the temperature throughout the whole system to understand what is going on.
Subtle cues of a bad thermister
- The initial sequence could possibly never start because of any broken thermistor
- The main blower fails in its attempt to get up to full speed
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