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Lennox G20 Thermistor
A very basic thermistor is a type of resistor that has a swinging resistance is governed by the amount of, or lack thereof, heat. They notify the circuit board when a certain temperature in increasing or decreasing. The heating system takes the temperature in several different areas to know what to do next.
Some warnings the Lennox thermister needs a replacement ASAP
- The initial sequence may never start up depending on which is the damaged thermistor
- Main blower may fail in the attempt to ramp up
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Before buying or purchasing do your best and make sure of the correct model and also make a visual inspection so that you are positive that the correct thermistor is the one being purchased. Replacing a new thermistor is a breeze provided you energy and have the tools to do it right.
Feel free to download your manual for help.
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