Furnace troubleshooting

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

While your Lennox® furnace isn’t able to talk to you, it does have a procedure to communicate a furnace error.

Its motherboard has a set of LED lights that can show a fault code. Depending on the failure, your furnace could display steady or flashing lights.

Though there are a few simple heating adjustments you can finish without an expert, the majority of tasks are best handled by the professionals. When your heating system won’t turn on or give warmth, reach out to Brandon Heating and Plumbing at 204-728-0180 for expert furnace repair in Brandon.

Our specialists will swiftly spot and fix the malfunction, even if you don’t use a Lennox furnace. We can repair all kinds or configuration—and get the heat restored to your home quickly.


What Does the Flashing Light on My Furnace Mean?

Your heater relies on lights to flash code when it isn’t working right. It also uses this system to tell you it’s heating properly.

Correct heating consists of:

  • Simultaneous slow flash—furnace working correctly.
  • Simultaneous fast flash—furnace is beginning to call for heat.

If you see one light going on and off slowly and the other going on and off rapidly, your heater might be experiencing a low flame signal. This can occur even when your furnace is heating properly. It indicates the flame sensing rod could need to be cleaned or in the incorrect location on the burner. Reach out to us at 204-728-0180 for assistance.

Here are several other of the most typical issues for Lennox heaters.

Heating System Will Not Kick On

Here are many of the light arrangements you may observe when your furnace will not or stay on. The majority of these issues need to be handled by a professional, like one from Brandon Heating and Plumbing.

  1. The pair of LED lights aren’t lit. This indicates your heating system might not have power. Go to the breaker box to make sure the heater fuse has not tripped. You should reset the fuse if it is in the “off” area. If it immediately flips after you reset it, don’t touch the breaker and contact us at 204-728-0180.
  2. A single light is stable and the other is flashing slowly. This shows the flame rollout switch is may be not working right. The switch is an essential safety device that aids in preventing fires and carbon monoxide. You shouldn’t attempt to take care of this problem on your own.
  3. One light is flashing quickly and the other is flickering slowly. This likely indicates power polarity has been inverted. Your heating system may have a wiring error that needs expert support from Brandon Heating and Plumbing.
  4. The pair of lights are flickering slowly. This signifies your heater’s blower motor probably isn’t running. This piece moves hot air from the heater into your house. We can assist in figuring out what’s wrong with this component.
  5. A single light is flashing slowly and the other is flashing rapidly. This signifies your heating system may have low voltage or a short circuit. Call our professionals at 204-728-0180 for support.
  6. One light is flashing on, on and off while the other flickers on, off, on. This signifies there may be a malfunction with your HVAC system’s control panel or wiring. Brandon Heating and Plumbing can determine the fault and take care of it.
  7. The pair of lights show every other slow flickers. This indicates your HVAC system may have a flame problem. There may be a problem with its gas supply, gas valve or ignitor control. Contact us at 204-728-0180 for support.
  8. One light flickers slowly while the other is continuous. This typically signifies your heater’s limit switch is experiencing an error. The switch stops your HVAC system from overheating. Reach out to the specialists at Brandon Heating and Plumbing for assistance.

Heater Blower Runs But No Warmth

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

  • The duo of lights are giving alternating quick flashes. This indicates your furnace ignitor may be broken. This part kindles fuel in your furnace to produce heat and should be fixed by a specialist from Brandon Heating and Plumbing.

Depend on Us for Expert Furnace Repair

When you need to get your furnace repaired without delay, trust the professionals at Brandon Heating and Plumbing. Our pros will take care of the error right away and have your residence feeling comfortable again in a short time. Contact us at 204-728-0180 or contact us online to request an appointment right away.

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