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Trane PTHD120 Thermistor
In an HVAC system, a thermistor is a certain type of resistor whose resistance fluctuates depending on the thermal temperature. They tell the system control board when a temperature in increasing or decreasing. The system takes the temperature in several different areas to do its job as it should.
Signs of a faulty Trane thermister
- Main blower fails in its attempt to get up to full speed
- The heating and cooling system may not function due to a bad thermistor
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