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

December 06, 2019

While your Lennox® HVAC equipment can’t chat with you, it possesses a process to communicate a furnace error.

Its motherboard has twin LED lights that can show a fault code. Based on the malfunction, your heater might show solid or flashing lights.

Though there are a few basic furnace adjustments you can take care of yourself, many services are best handled by HVAC technicians. When your heater refuses to start or put out warmth, call Redhawk Heating & Air Conditioning at 432-237-0168 for skilled furnace repair in Odessa.

Our experts will quickly diagnose and take care of the fault, even if you don’t use a Lennox heater. We can fix whichever types or configuration—and get the heat reintroduced to your home quickly.


What Does the Flickering Light on My Furnace Mean?

Your heater depends on lights to flash code when it is malfunctioning. It also engages this system to relay it’s running properly.

Correct function includes:

  • Simultaneous slow flash—heating system heating like it should.
  • Concurrent fast flash—heating system is initiating the call for heat.

If you notice a lone light flashing slowly and the other going on and off quickly, your heater may be having a low flame signal. This can happen even when your heater is running properly. It indicates the flame sensing rod could be dirty or in the wrong spot on the burner. Reach out to us at 432-237-0168 for help.

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

Heater Refuses to Turn On

Here are some of the light patterns you could observe when your heater will not or keep running. The majority of these problems must be fixed by a specialist, like one from Redhawk Heating & Air Conditioning.

  1. Both LED lights are extinguished. This indicates your heating system might not be receiving power. Go to the breaker box to confirm the furnace fuse has not flipped. You should reset the fuse if it’s in the “off” spot. If it immediately flips after a subsequent reset, don’t touch the breaker and get in touch with us us at 432-237-0168.
  2. A single light is solid and the other is flashing slowly. This shows the flame rollout switch is probably malfunctioning. The component is an important safety device that assists in preventing fires and carbon monoxide. You shouldn’t seek to repair this malfunction on your own.
  3. A single light is flashing quickly and the other is flickering slowly. This likely signifies power polarity has been reversed. Your heating system could have a wiring fault that requires professional assistance from Redhawk Heating & Air Conditioning.
  4. The pair of lights are flickering slowly. This indicates your heating system’s blower motor possibly isn’t running. This piece circulates hot air from the heating system into your rooms. We can assist in figuring out what’s causing a problem with this piece.
  5. One light is blinking slowly and the other is flickering quickly. This signifies your furnace might have low voltage or a short circuit. Call our experts at 432-237-0168 for help.
  6. One light is flickering on, on and off while the other blinks on, off, on. This indicates there could be trouble with your furnace’s control board or wiring. Redhawk Heating & Air Conditioning can locate the error and take care of it.
  7. Both lights show alternate slow flashes. This signifies your furnace may have a flame failure. There might be a problem with its gas supply, gas valve or ignitor control. Contact us at 432-237-0168 for support.
  8. An individual light flickers slowly while the other remains continuous. This usually signifies your heater’s limit switch is experiencing an error. The switch prevents your furnace from becoming too warm. Call the specialists at Redhawk Heating & Air Conditioning for support.

Heating System Blower Runs But No Warm Air

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

  • Both lights display every other quick blinks. This means your furnace ignitor could not be in working order. This piece lights fuel in your HVAC equipment to create warmth and should be fixed by a specialist from Redhawk Heating & Air Conditioning.

Trust Us for Professional Furnace Repair

When you need to get your HVAC equipment repaired quickly, trust the experts at Redhawk Heating & Air Conditioning. Our pros will handle the fault quickly and have your residence feeling relaxing again in no time. Get in touch with us at 432-237-0168 or contact us online to get an appointment now.