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Lennox OF25-120 Thermistor
In an HVAC system, a thermistor is a type of resistor which has a resistance that changes as it depends on thermal temperature. The heating and cooling system takes the temperature throughout the whole system to understand what is going on. They inform the system when the temperature in increasing or decreasing.
Subtle cues to watch for in a failing thermister
- The initial sequence may not operate because of any failed thermistor
- Blower fan may fail in its attempt to engage full speed spinning
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If you decide on picking up or purchasing any Lennox OF25-120 part, do your due diligence and cross-check the correct model as well as make a visual comparison in order to be sure the correct thermistor is the one being purchased. You do not need to replace the part all by yourself. Search for a pro in your town or city to do it for you.
Feel free to download your manual for help.
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