Furnace troubleshooting

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

While your Lennox® HVAC equipment cannot talk to you, it possesses a way to communicate a furnace error.

Its control panel has two LED lights that can share a fault code. Depending on the malfunction, your heater could show continuous or flashing lights.

Although there are a few simple HVAC repairs you can finish on your own, many services are best handled by HVAC technicians. When your furnace won’t start or deliver heat, contact Hopper Heating and Air at 704-233-7363 for professional furnace repair in Shelby.

Our experts will speedily determine and take care of the fault, even if you don’t own a Lennox heater. We can fix any types or configuration—and get the comfort reintroduced to your house quickly.


What Does the Flickering Light on My Furnace Mean?

Your heating system uses lights to flash code when it requires repairs. It also engages this setup to relay it’s working correctly.

Correct function includes:

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

If you notice one light going on and off slowly and the other blinking rapidly, your furnace might have a low flame signal. This can take place even when your heater is running properly. It means the flame sensing rod may be dirty or in the bad spot on the burner. Reach out to us at 704-233-7363 for assistance.

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

Heating System Won’t Kick On

Here are a few of the light arrangements you could see when your heating system will not or keep running. The majority of these issues have to be fixed by a specialist, like one from Hopper Heating and Air.

  1. All LED lights are off. This means your HVAC system might not have electricity. Examine the breaker box to confirm the furnace fuse hasn’t triggered. You should reset the fuse if it has moved into the “off” position. If it promptly flips following a reset, don’t touch the breaker and get in touch with us us at 704-233-7363.
  2. A single light is continuous and the other is flickering slowly. This implies the flame rollout switch is likely malfunctioning. The switch is an essential safety tool that aids in stopping fires and carbon monoxide. You shouldn’t attempt to handle this problem on your own.
  3. An individual light is flickering quickly and the other is blinking slowly. This usually means power polarity has been inverted. Your heating system might have a wiring issue that needs expert aid from Hopper Heating and Air.
  4. The pair of lights are flashing slowly. This indicates your furnace’s blower motor likely isn’t running. This component sends heated air from the heater into your home. We can help in figuring out what’s wrong with this piece.
  5. One light is flickering slowly and the other is flashing quickly. This means your heating system might have insufficient voltage or a short circuit. Contact our technicians at 704-233-7363 for support.
  6. One light is blinking on, on and off while the other blinks on, off, on. This indicates there may be a fault with your furnace’s motherboard or wiring. Hopper Heating and Air can pinpoint the problem and handle it.
  7. Both lights show alternate slow flashes. This indicates your heating system possibly has a flame problem. There could be trouble with its gas supply, gas valve or ignitor control. Reach out to us at 704-233-7363 for help.
  8. One light flickers slowly while the other stays solid. This typically means your HVAC system’s limit switch is not working. The switch stops your furnace from becoming too warm. Contact the professionals at Hopper Heating and Air for help.

Heater Blower Works But No Heat

Here’s what could be at fault when you hear your heating system’s blower fan running, but you aren’t receiving any heated air.

  • The pair of lights are giving alternate quick flickers. This signifies your furnace ignitor may not be working. This component kindles fuel in your furnace to create heat and should be serviced by an expert from Hopper Heating and Air.

Depend on Us for Expert Furnace Repair

When you have to have your HVAC equipment in working order fast, depend on the specialists at Hopper Heating and Air. Our pros will repair the problem without delay and have your rooms feeling comfortable again in a short time. Contact us at 704-233-7363 or contact us online to request an appointment today.

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