Most Frequent Lennox® Furnace Error Codes (and What They Mean)

December 06, 2019

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

Its motherboard has double LED lights that can show a fault code. Subject to the fault, your furnace might display steady or flashing lights.

Though there are certain basic furnace repairs you can complete on your own, most tasks are best taken care of by the professionals. When your heating system will not kick on or provide warmth, contact Air Concepts of Middle Georgia at 478-200-5689 for skilled furnace repair in Milledgeville and Middle Georgia.

Our technicians will rapidly identify and handle the malfunction, even if you don’t have a Lennox heater. We can repair all kinds or models—and get the heat reintroduced to your residence without delay.


What Does the Flashing Light on My Heating System Mean?

Your heating system uses lights to flash code when it is malfunctioning. It also engages these lights to tell you it’s running like it should.

Normal function consists of:

  • Concurrent slow flash—heater heating like it should.
  • Both lights flash fast—furnace is starting to call for heat.

If you notice a solitary light flashing slowly and the other blinking fast, your heater could be experiencing a low flame signal. This can take place even when your heater is heating properly. It means the flame sensing rod could need to be cleaned or in the bad location on the burner. Call us at 478-200-5689 for support.

Here are some of the most typical faults for Lennox heating systems.

Heater Refuses to Turn On

Here are a few of the light sequences you may observe when your furnace will not or stay on. The bulk of these issues have to be handled by an expert, for instance from Air Concepts of Middle Georgia.

  1. Both LED lights are off. This indicates your furnace might not have electricity. Look at the breaker box to make sure the heater fuse has not triggered. Attempt to reset the fuse if it is in the “off” spot. If it rapidly turns off following a reset, don’t try to reset it again and contact us at 478-200-5689.
  2. An individual light is unchanging and the other is flashing slowly. This signifies the flame rollout switch is possibly malfunctioning. The component is a critical safety tool that aids in avoiding fires and carbon monoxide. You shouldn’t attempt to repair this malfunction yourself.
  3. One light is flickering rapidly and the other is blinking slowly. This likely means power polarity has been reversed. Your heating system might have a wiring problem that needs expert support from Air Concepts of Middle Georgia.
  4. All lights are blinking slowly. This means your heating system’s blower motor probably isn’t running. This component distributes warm air from the furnace into your space. We can help in figuring out what’s causing an issue with this part.
  5. A single light is blinking slowly and the other is blinking rapidly. This indicates your furnace may have insufficient voltage or a short circuit. Call our technicians at 478-200-5689 for assistance.
  6. One light is blinking on, on and off while the other flashes on, off, on. This signifies there could be trouble with your HVAC system’s control panel or wiring. Air Concepts of Middle Georgia can pinpoint the issue and take care of it.
  7. The pair of lights are using every other slow blinks. This indicates your HVAC system likely has a flame error. There might be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 478-200-5689 for help.
  8. One light blinks slowly while the other remains solid. This usually signifies your HVAC system’s limit switch is experiencing an error. The switch keeps your heating system from getting too hot. Get in touch with the experts at Air Concepts of Middle Georgia for support.

Heater Blower Works But No Warmth

Here’s what might be at fault when you hear your heating system’s blower fan working, but you aren’t getting any warm air.

  • The duo of lights display alternating rapid blinks. This means your furnace ignitor might not be working. This part lights fuel in your heater to make warmth and should be fixed by a professional from Air Concepts of Middle Georgia.

Depend on Us for Expert Furnace Repair

When you need to have your HVAC equipment repaired without delay, depend on the experts at Air Concepts of Middle Georgia. Our techs will fix the issue promptly and have your house feeling cozy again in a short time. Get in touch with us at 478-200-5689 or contact us online to schedule an appointment now.