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Friedrich MW12Y3FM Thermistor
A thermistor is a special kind of new age resistor that has a varied resistance that will fluctuate depending on the temperature at its location. The control board deciphers the temp in some specific areas of the system to do its job as it should. They inform the system control board when the temperature reaches a certain point.
What are the signs that the thermister is crapping out?
- The AC and heat system may not even start due to any one failed thermistor
- The system blower may refuse in the attempt to begin full speed blowing
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