When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission.
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network
Lennox XC21 Thermistor
A very basic thermistor is a specific kind of resistor whose rated resistance depends on the amount of, or lack thereof, heat. The HVAC system interprets the temperature in a few critical areas to do its job as it should. They notify the main board when a certain temperature in increasing or decreasing.
Easy warnings of a barely functioning system thermister
- The whole HVAC system may not initiate the starting sequence depending on which is the thermistor that is damaged
- The main blower could possibly fail to begin to ramp up
This site contains affiliate links for which I may be compensated
Before buying or ordering a new Lennox XC21 replacement part do your best and cross-check the model number and also make a visual comparison so that you are positive that the correct thermistor is being ordered. You do not have to replace the part all by yourself. Look for a professional locally to do it for you.
Feel free to download your manual for help.
This site contains affiliate links for which I may be compensated
