Furnace troubleshooting

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

While your Lennox® heater isn’t able to chat with you, it has a process to tell you about a furnace error.

Its control panel has two LED lights that can display a fault code. Depending on the failure, your furnace might use continuous or flashing lights.

Although there are certain simple heating repairs you can complete on your own, the majority of fixes are best left to HVAC technicians. When your furnace refuses to turn on or deliver heated air, call Brooks Heating and Air Conditioning at 800-COOLING for professional furnace repair in Bossier City.

Our experts will quickly spot and take care of the breakdown, even if you don’t use a Lennox heater. We can repair all types or makes—and get the warmth restored to your home quickly.


What Does the Flickering Light on My Heating System Mean?

Your heating system relies on lights to flash code when it requires repairs. It also uses this system to relay it’s working like it should.

Correct operation involves:

  • Both lights flash slowly—furnace operating like it should.
  • Concurrent fast flash—furnace is starting to call for heat.

If you see a lone light going on and off slowly and the other flashing quickly, your furnace may have a low flame signal. This can occur even when your furnace is running properly. It indicates the flame sensing rod may need to be cleaned or in the incorrect spot on the burner. Call us at 800-COOLING for help.

Here are some of the most common issues for Lennox heaters.

Heater Refuses to Kick On

Here are some of the light sequences you could observe when your heater will not or keep heating. The bulk of these problems have to be taken care of by a professional, for instance from Brooks Heating and Air Conditioning.

  1. All LED lights are off. This indicates your HVAC system might not have power. Go to the breaker box to make sure the heating system fuse is not flipped. You should reset the fuse if it is in the “off” area. If it immediately turns off after a subsequent reset, leave the breaker alone and call us at 800-COOLING.
  2. A single light is stable and the other is flickering slowly. This shows the flame rollout switch is likely malfunctioning. The part is a critical safety guard that assists in preventing fires and carbon monoxide. You shouldn’t try to fix this fault without professional help.
  3. A single light is blinking quickly and the other is blinking slowly. This typically signifies power polarity has been inverted. Your furnace could have a wiring fault that calls for expert help from Brooks Heating and Air Conditioning.
  4. Both lights are blinking slowly. This means your heating system’s blower motor possibly isn’t working. This piece moves warm air from the HVAC system into your house. We can help in determining what’s causing an issue with this component.
  5. A single light is blinking slowly and the other is blinking fast. This indicates your HVAC system may have not enough voltage or a short circuit. Get in touch with our experts at 800-COOLING for support.
  6. One light is flickering on, on and off while the other flashes on, off, on. This indicates there might be a problem with your heating system’s control panel or wiring. Brooks Heating and Air Conditioning can pinpoint the error and fix it.
  7. The pair of lights display every other slow flashes. This indicates your HVAC system likely has a flame error. There might be an issue with its gas supply, gas valve or ignitor control. Call us at 800-COOLING for help.
  8. A single light flashes slowly while the other remains solid. This typically means your heating system’s limit switch is open. The switch prevents your heating system from getting too hot. Reach out to the experts at Brooks Heating and Air Conditioning for assistance.

Heater Blower Works But No Warmth

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

  • The duo of lights are giving alternate quick blinks. This indicates your furnace ignitor may be broken. This piece ignites gas in your heater to make warmth and should be serviced by a technician from Brooks Heating and Air Conditioning.

Depend on Us for Expert Furnace Repair

When you need to have your furnace fixed quickly, trust the experts at Brooks Heating and Air Conditioning. Our technicians will take care of the problem quickly and have your residence feeling relaxing again soon. Call us at 800-COOLING or contact us online to request an appointment right away.

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