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International Comfort Products T9MPD100J20A1 Thermistor
A thermistor is a certain type of resistor whose rated resistance fluctuates depending on the thermal temperature. The furnace or AC deciphers the temp in several different areas to make a decision on what needs to be done. They tell the system control board when a temperature has been reached.
Signs your all-important thermister needs a replacement ASAP
- The blower could possibly fail in its attempt to ramp up the airflow
- The heating and AC system may not function due to a thermistor that is malfunctioning
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