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Lennox XC21 Flame Sensor
A flame sensor is an important feature that senses the flame while the system is starting. As you could guess, when the flame sensor gets triggered by something the whole HVAC system will remain stopped until the problem is fixed.
Warnings the Lennox flame sensor needs replacing
- The gas that has entered the furnace cannot begin an ignition sequence and the board throws an error
- HVAC system works sporadically when the time is right
- Your furnace is unable to even start and shuts down
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If you decide on picking up or purchasing, do your due diligence and make sure of the correct model as well as make a visual inspection in order to be sure the proper replacement flame sensor is the one being purchased. There is no need to install the part by yourself. Hire a pro in your town or city to pay to install it for you.
Feel free to download your manual for help.
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