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Lennox XP14-042 Thermistor
In an HVAC system, a thermistor is a type of resistor that has a varied resistance that is directly proportioned to heat. The furnace or AC reads the temperature in order to be sure everything is going well. They inform the system when a temperature has been reached.
Some clues the temp-regulating thermister is in need of replacing
- The main fan could fail in its attempt to ramp up
- The heating and AC system may not operate due to any one malfunctioning thermistor
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