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Lennox 90UGF Series Thermistor
In an HVAC system, a thermistor is a specific kind of resistor which has a resistance that changes as it depends on current temperature. They tell the HVAC system when the temperature in increasing or decreasing. The system control board must know the temp throughout the whole system to do its job correctly.
What are the signs that the main thermister is in need of replacing?
- Main blower may fail to begin to ramp up
- The entire system could possibly not operate due to a stuck thermistor
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If you decide on picking up or purchasing, do your due diligence and double check the model number and also make a visual inspection in order to be sure the proper replacement thermistor is being ordered. You do not need to install the part by yourself. Consult with a professional in your town or city to pay to install it for you.
Feel free to download your manual for help.
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