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Lennox HPXB15-030 Thermistor
A very basic thermistor is a thermal resistor, whose resistance will fluctuate depending on the actual temperature is perceives. They inform the system control board when a certain temperature reaches a certain point. The system control board must know the temp in a few critical areas to know what to do next.
Red flags the Lennox thermister needs replacing
- The blower could never begin to begin to get up to full speed
- The heating and AC system may never begin depending on which is the failed thermistor
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