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Carrier 25HPA442A0030010 Thermistor
A thermistor is a special kind of new age resistor that has a varied resistance that is governed by current temperature. The control board needs to know the temperature in several different areas to be sure everything is going well. They convey to the system when a temperature reaches a certain point.
Major indications the Carrier thermister will eventually need to be replaced
- The heating and AC system may never begin because of the failed thermistor
- Blower motor may fail to begin to engage full speed spinning
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