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

December 06, 2019

While your Lennox® heating system isn’t able to chat with you, it has a process to communicate a furnace error.

Its control board has a set of LED lights that can display a fault code. Subject to the failure, your heating system might display continuous or flashing lights.

Though there are certain basic heating adjustments you can complete on your own, most tasks are best handled by HVAC technicians. When your heating system will not kick on or provide warm air, call Bain Heating & Air Conditioning, Inc at 256-270-1196 for expert furnace repair in Heflin.

Our specialists will rapidly pinpoint and take care of the malfunction, even if you don’t own a Lennox heating system. We can service all kinds or makes—and get the comfort returned to your home without delay.


What Does the Blinking Light on My Heating System Mean?

Your heating system depends on lights to flash code when it is malfunctioning. It also uses this setup to tell you it’s operating properly.

Regular function includes:

  • Simultaneous slow flash—heater working properly.
  • Both lights flash fast—heater is initiating the call for heat.

If you realize that a solitary light going on and off slowly and the other flashing quickly, your furnace may have a low flame signal. This can happen even when your heating system is working properly. It means the flame sensing rod may need to be cleaned or in the wrong location on the burner. Reach out to us at 256-270-1196 for assistance.

Here are a few other of the most typical faults for Lennox heating systems.

Heater Won’t Kick On

Here are many of the light arrangements you could observe when your heating system won’t turn on or keep operating. Most of these issues have to be handled by an expert, like one from Bain Heating & Air Conditioning, Inc.

  1. The duo of LED lights are extinguished. This means your heater might not be receiving power. Go to the breaker box to ensure the furnace fuse isn’t triggered. You should reset the fuse if it has moved into the “off” spot. If it promptly turns off following a reset, leave the breaker alone and contact us at 256-270-1196.
  2. One light is solid and the other is blinking slowly. This signifies the flame rollout switch is may be open. The part is an essential safety mechanism that assists in stopping fires and carbon monoxide. You shouldn’t attempt to take care of this fault yourself.
  3. A single light is flickering quickly and the other is flashing slowly. This typically means power polarity has been reversed. Your heating system might have a wiring problem that calls for professional aid from Bain Heating & Air Conditioning, Inc.
  4. All lights are flickering slowly. This indicates your heater’s blower motor possibly isn’t working. This piece moves heated air from the HVAC system into your residence. We can help in figuring out what’s causing an issue with this piece.
  5. One light is blinking slowly and the other is flickering fast. This means your HVAC system could have insufficient voltage or a short circuit. Call our specialists at 256-270-1196 for assistance.
  6. One light is blinking on, on and off while the other flickers on, off, on. This signifies there could be a fault with your furnace’s motherboard or wiring. Bain Heating & Air Conditioning, Inc can determine the problem and handle it.
  7. Both lights show alternating slow flashes. This signifies your heater likely has a flame issue. There may be trouble with its gas supply, gas valve or ignitor control. Contact us at 256-270-1196 for help.
  8. An individual light flashes slowly while the other remains steady. This typically means your heating system’s limit switch is not working. The switch keeps your heater from overheating. Get in touch with the experts at Bain Heating & Air Conditioning, Inc for help.

Heating System Blower Works But No Warm Air

Here’s what could be broken when you observe your heating system’s blower fan running, but you aren’t gaining any heat.

  • The duo of lights are showing every other fast blinks. This signifies your furnace ignitor might not be in working order. This component lights energy in your heating system to create heat and should be serviced by a professional from Bain Heating & Air Conditioning, Inc.

Depend on Us for Expert Furnace Repair

When you have to have your HVAC equipment fixed quickly, depend on the specialists at Bain Heating & Air Conditioning, Inc. Our pros will repair the issue promptly and have your space feeling relaxing again in no time. Get in touch with us at 256-270-1196 or contact us online to get an appointment now.