A Lennox furnace is one of the greatest home heating appliances on the market, but even the best furnaces can break down.
This comprehensive Lennox furnace troubleshooting guide provides accurate, step-by-step directions for troubleshooting and repairing any possible furnace issue.
I’ll also advise you on which issues you should seek professional help for rather than attempting to handle on your own.
If you want to troubleshoot a specific Lennox furnace problem, you can navigate right to it using the table of contents below.
Disclaimer !!! This site is created for educational purposes only!!
How can you figure out what an error code on a Lennox furnace means?
Although furnace fault codes vary by type, all Lennox furnaces employ a blinking light system to transmit trouble codes. Locate the LED light and take note of its blinking pattern to read a furnace trouble code. Please make a note of how many times the light flashes and how swiftly it blinks. Remove the front cover and you will see the error codes list on your furnace and the error code itself.
| Lennox Furnace Error Codes | Meaning | Potential Issue |
| E200 | The furnace rollout limit switch is open | Reset roll-out switch. Test the furnace operation. Check for blocked or obstructed vent pipes (Intake and/or Exhaust). Check for flame stability, if a flame is unstable, call an HVAC technician. |
| E201 | Lost communication with indoor blower motor | Possible causes include a power outage, brown-out, motor not powered, loose wiring, and condensation on system component control without the cover on the breaker. |
| E223 | The furnace low-pressure switch is open | This means your furnace’s low-pressure switch is open. Call a licensed HVAC technician. |
| E241 | Flame Sensor out of Sequence | Clean flame sensor. Or call a licensed HVAC technician. |
| E292 | Indoor blower motor unable to start | This signifies your furnace’s blower motor can’t start. Most likely the blower motor needs to be replaced |
When You Should Call Vase Heating & Cooling
Warning If you smell gas in your home,
Small, gas odours from a furnace are common, especially if you’ve just switched it on for the heating season. A strong, persistent gas odour from your furnace could signify a serious gas leak, and you should LEAVE YOUR HOME IMMEDIATELY and call 9-1-1 and HVAC professional.
Carbon monoxide detectors should also be installed throughout your home. Your furnace produces small amount of carbon monoxide as it burns fuel. A well-running furnace will be able to deposit this harmful gas in a safe manner; but, if your furnace is not properly maintained or has serious issues, it could produce a dangerous amount of carbon monoxide. In Case Carbon monoxide levels increase and remain above 70 ppm, symptoms become more noticeable and can include headache, fatigue, and nausea. At sustained CO concentrations above 150 to 200 ppm, disorientation, unconsciousness, and death are possible. Carbon monoxide is a deadly odorless and colorless gas, so all homeowners should install Carbon monoxide detectors. If your carbon monoxide detector alarms, LEAVE YOUR HOME IMMEDIATELY and dial 9-1-1 and call your local HVAC service provider.
Warning If your furnace is making unusual noises
Any loud hissing or banging noises could indicate a larger problem at hand. If you hear strange noises coming from your furnace, there may be an electrical issue within your unit. Call an HVAC professional to troubleshoot your furnace in this case.
Warning If troubleshooting does not fix the problem
If you’ve tried everything on this list, or are uncomfortable trying, and your home is still feeling cold, it’s time to call in an HVAC professional. Beyond these steps, your furnace likely requires maintenance or replacement that only someone with professional knowledge of HVAC devices can perform.
Need Help with Your Lennox Furnace repair? Consult Our Edmonton’s Furnace Repair Experts
When it comes to troubleshooting, many furnace problems will necessitate the assistance of a knowledgeable specialist. Furthermore, in rare circumstances, if a problem is not resolved properly, the heating system might become extremely dangerous for you and your loved ones. For instance, in case if furnace heat exchanger has a crack. To address furnace troubleshooting codes, it’s recommended that you seek a furnace repair expert. Keep in mind that frequent furnace tune-ups and maintenance can assist to reduce the need for repairs.
Vese Heating & Cooling is ready to assist you with your furnace needs. Please do not hesitate to contact our furnace repair specialists at any time.
