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Lennox CB27UH-048 Thermistor
A very basic thermistor is a special kind of new age resistor that has a varied resistance that is contingent on the temperature at its location. They can tell the circuit board when the temperature in increasing or decreasing. The HVAC system deciphers the temp in order to ensure that things are as they should be.
Major clues of a poorly working Lennox thermister
- The main blower could never begin in the attempt to engage full speed
- The system may not even begin to function due to a thermistor that is stuck open
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