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Friedrich VHA09K Thermistor
A thermistor is a certain type of resistor that has a varied resistance that varies depending on the temperature. They convey to the main board when the temperature in increasing or decreasing. The system must know the temp throughout the whole system to know what to do next.
Clues the temp-regulating thermister is in dire need of a replacement
- The main fan may refuse to begin to ramp up
- The whole system may not operate because of any failed thermistor
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