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

December 06, 2019

While your Lennox® HVAC equipment isn’t able to chat with you, it possesses a way to tell you about a furnace error.

Its control panel has two LED lights that can display a fault code. Based on the issue, your heater might use continuous or flashing lights.

Although there are some elementary heating repairs you can do on your own, most repairs are best handled by the professionals. When your heating system refuses to start or deliver heated air, reach out to Gopher Heating and Air Conditioning at 952-373-0377 for professional furnace repair in Savage.

Our technicians will quickly diagnose and take care of the fault, even if you don’t have a Lennox heater. We can fix whichever brands or configuration—and get the comfort reintroduced to your house quickly.


What Does the Flickering Light on My Furnace Mean?

Your furnace relies on lights to flash code when it is malfunctioning. It also works this setup to let you know it’s working correctly.

Regular heating involves:

  • Concurrent slow flash—heating system working correctly.
  • Concurrent fast flash—heating system is beginning to call for heat.

If you notice a single light flashing slowly and the other flashing rapidly, your furnace might be experiencing a low flame signal. This can happen even when your heater is running correctly. It indicates the flame sensing rod may need to be cleaned or in the wrong area on the burner. Reach out to us at 952-373-0377 for help.

Here are a few other of the most common problems for Lennox HVAC systems.

Heating System Refuses to Turn On

Here are a few of the light arrangements you might notice when your heater won’t turn on or keep operating. Most of these issues need to be fixed by a technician, for instance from Gopher Heating and Air Conditioning.

  1. The pair of LED lights aren’t lit. This signifies your heater might not be receiving power. Look at the breaker box to confirm the furnace fuse is not triggered. You should reset the fuse if it’s in the “off” spot. If it promptly flips after you reset it, leave the breaker alone and get in touch with us us at 952-373-0377.
  2. An individual light is stable and the other is flickering slowly. This shows the flame rollout switch is possibly malfunctioning. The switch is an important safety mechanism that assists in preventing fires and carbon monoxide. You shouldn’t attempt to handle this issue without professional help.
  3. An individual light is blinking fast and the other is flashing slowly. This often signifies power polarity has been reversed. Your heating system might have a wiring fault that calls for expert help from Gopher Heating and Air Conditioning.
  4. The pair of lights are flickering slowly. This means your furnace’s blower motor likely isn’t working. This piece moves heated air from the furnace into your home. We can help in figuring out what’s wrong with this part.
  5. An individual light is flashing slowly and the other is blinking rapidly. This indicates your furnace may have low voltage or a short circuit. Reach out to our specialists at 952-373-0377 for support.
  6. One light is flickering on, on and off while the other blinks on, off, on. This indicates there may be a fault with your furnace’s control panel or wiring. Gopher Heating and Air Conditioning can find the issue and take care of it.
  7. The pair of lights display every other slow flickers. This signifies your HVAC system likely has a flame failure. There may be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 952-373-0377 for help.
  8. A single light flashes slowly while the other remains steady. This usually means your heating system’s limit switch is experiencing an error. The switch keeps your HVAC system from becoming too warm. Get in touch with the specialists at Gopher Heating and Air Conditioning for support.

Heating System Blower Operates But No Warmth

Here’s what could be at fault when you hear your heater’s blower fan on, but you aren’t gaining any warm air.

  • Both lights are giving alternating rapid blinks. This signifies your furnace ignitor could not be working. This part kindles energy in your furnace to make heat and should be fixed by a specialist from Gopher Heating and Air Conditioning.

Trust Us for Skilled Furnace Repair

When you have to get your heating system fixed quickly, depend on the experts at Gopher Heating and Air Conditioning. Our pros will fix the fault quickly and have your residence feeling cozy again in a short time. Call us at 952-373-0377 or contact us online to get an appointment today.