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Payne PY2PNB048130AA Thermistor
A thermistor is a certain type of resistor whose rated resistance is contingent on the temperature. The furnace or AC needs to know the temperature in several different areas to do its job correctly. They tell the HVAC system when a temperature reaches a certain point.
Simple signals the temp-regulating thermister is dying
- The whole HVAC system may not function depending on which is the damaged thermistor
- Blower fan may refuse in its attempt to engage full speed
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