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GE AZ75E09EACM1 Thermistor
A very basic thermistor is a specific kind of resistor that has a fluctuating resistance that varies depending on the amount of, or lack thereof, heat. The furnace or AC needs to know the temperature in a few critical areas to do its job correctly. They convey to the circuit board when the temperature has been reached.
Signals the system thermister has to be replaced
- The entire system may never begin because of the broken thermistor
- The system blower could refuse in the attempt to ramp up
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