Furnace troubleshooting

Top Lennox® Furnace Error Codes (and What They Mean)

While your Lennox® furnace can’t chat with you, it does have a way to tell you about a furnace error.

Its control board has twin LED lights that can show a fault code. Based on the failure, your furnace may show solid or flashing lights.

While there are various basic furnace adjustments you can do on your own, many repairs are best handled by HVAC technicians. When your heating system refuses to start or deliver warmth, reach out to Turner Brothers Heating & Air Conditioning at 912-208-2470 for professional furnace repair in Saint Marys.

Our technicians will swiftly diagnose and take care of the failure, even if you don’t own a Lennox furnace. We can fix all kinds or makes—and get the heat restored to your home without delay.


What Does the Flashing Light on My Heating System Mean?

Your heating system relies on lights to flash code when it requires repairs. It also engages this setup to let you know it’s working correctly.

Correct function consists of:

  • Both lights flash slowly—heating system running correctly.
  • Concurrent fast flash—heater is initiating the call for heat.

If you notice a single light blinking slowly and the other blinking quickly, your heating system could be experiencing a low flame signal. This can occur even when your heating system is heating correctly. It signifies the flame sensing rod may be dirty or in the incorrect area on the burner. Reach out to us at 912-208-2470 for help.

Here are several other of the most routine faults for Lennox HVAC systems.

Heater Refuses to Kick On

Here are some of the light sequences you could observe when your furnace will not or stay on. The bulk of these errors must be handled by a technician, such as one from Turner Brothers Heating & Air Conditioning.

  1. The duo of LED lights are extinguished. This indicates your furnace might not be receiving power. Check the breaker box to make sure the heater fuse isn’t tripped. You should reset the fuse if it has moved into the “off” position. If it immediately turns off after you reset it, don’t touch the breaker and call us at 912-208-2470.
  2. A single light is continuous and the other is flashing slowly. This signifies the flame rollout switch is may be open. The switch is an essential safety guard that assists in stopping fires and carbon monoxide. You shouldn’t try to fix this problem on your own.
  3. An individual light is flickering fast and the other is flashing slowly. This often indicates power polarity has been transposed. Your heating system could have a wiring fault that needs specialized help from Turner Brothers Heating & Air Conditioning.
  4. Both lights are flickering slowly. This means your heating system’s blower motor possibly isn’t working. This part circulates warm air from the HVAC system into your residence. We can assist in pinpointing what’s causing an issue with this component.
  5. A single light is blinking slowly and the other is blinking quickly. This indicates your heater might have not enough voltage or a short circuit. Contact our specialists at 912-208-2470 for support.
  6. One light is flickering on, on and off while the other flickers on, off, on. This signifies there might be trouble with your furnace’s control panel or wiring. Turner Brothers Heating & Air Conditioning can determine the error and take care of it.
  7. The pair of lights show every other slow flickers. This means your furnace may have a flame failure. There might be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 912-208-2470 for help.
  8. An individual light flickers slowly while the other is continuous. This usually means your heating system’s limit switch is not working. The switch keeps your heater from becoming too warm. Reach out to the experts at Turner Brothers Heating & Air Conditioning for assistance.

Heating System Blower Works But No Warm Air

Here’s what might be broken when you notice your heating system’s blower fan running, but you aren’t getting any heated air.

  • The duo of lights are giving alternate rapid blinks. This means your furnace ignitor might not be working. This component ignites fuel in your heating system to create heat and should be fixed by a technician from Turner Brothers Heating & Air Conditioning.

Trust Us for Professional Furnace Repair

When you need to have your heating system in working order fast, trust the specialists at Turner Brothers Heating & Air Conditioning. Our pros will repair the problem without delay and have your house feeling relaxing again in no time. Get in touch with us at 912-208-2470 or contact us online to request an appointment now.

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