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Friedrich MR12Y3H Thermistor
A very basic thermistor is a thermal resistor, whose rated resistance is governed by current temperature. The furnace or AC takes the temperature in several different areas to make sure everything is running smoothly. They inform the main board when a certain temperature reaches a certain point.
Chief elements of an ineffective system thermister
- The entire system may not initiate the starting sequence because of the damaged thermistor
- The main blower may refuse in the attempt to ramp up the airflow
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