While your Lennox® furnace isn’t able to speak to you, it possesses a process to get your attention when there’s a furnace error.

Its motherboard has two LED lights that can show a fault code. Based on the issue, your heating system may show steady or flashing lights.

Although there are certain simple HVAC fixes you can finish without an expert, many repairs are best left to the professionals. When your heater refuses to kick on or put out warmth, contact Air Alliance Team at 636-206-4584 for experienced furnace repair in Ballwin and St. Charles.

Our technicians will swiftly determine and handle the issue, even if you don’t use a Lennox heater. We can fix any types or models—and get the warmth returned to your house quickly.

What Does the Flickering Light on My Furnace Mean?

Your furnace depends on lights to flash code when it isn’t working right. It also engages these lights to let you know it’s working properly.

Regular function involves:

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

If you see a single light going on and off slowly and the other blinking fast, your heater could have a low flame signal. This can take place even when your heater is working properly. It means the flame sensing rod might be dirty or in the bad spot on the burner. Reach out to us at 636-206-4584 for help.

Here are several other of the most common problems for Lennox heaters.

Furnace Will Not Kick On

Here are a few of the light patterns you may observe when your heating system will not or keep heating. The majority of these issues need to be handled by a technician, for instance from Air Alliance Team.

  1. The duo of LED lights are extinguished. This means your HVAC system might not have power. Go to the breaker box to make sure the heater fuse isn’t triggered. Try resetting the fuse if it is in the “off” area. If it immediately turns off following a reset, don’t touch the breaker and contact us at 636-206-4584.
  2. A single light is unchanging and the other is blinking slowly. This implies the flame rollout switch is possibly open. The component is an essential safety tool that helps in preventing fires and carbon monoxide. You shouldn’t attempt to fix this malfunction yourself.
  3. An individual light is flashing fast and the other is flickering slowly. This likely signifies power polarity has been reversed. Your heating system could have a wiring problem that requires expert assistance from Air Alliance Team.
  4. All lights are flickering slowly. This means your heating system’s blower motor likely isn’t working. This part circulates hot air from the heating system into your rooms. We can help in determining what’s causing a problem with this component.
  5. A single light is flickering slowly and the other is flashing quickly. This indicates your heating system may have low voltage or a short circuit. Call our specialists at 636-206-4584 for assistance.
  6. One light is flashing on, on, off while the other flashes on, off, on. This signifies there may be a fault with your heater’s motherboard or wiring. Air Alliance Team can pinpoint the error and handle it.
  7. Both lights display every other slow flashes. This indicates your HVAC system may have a flame failure. There might be a problem with its gas supply, gas valve or ignitor control. Call us at 636-206-4584 for support.
  8. A single light blinks slowly while the other is continuous. This often signifies your heater’s limit switch is not working. The switch stops your HVAC equipment from overheating. Get in touch with the experts at Air Alliance Team for support.

Heating System Blower Works But No Warm Air

Here’s what may be broken when you observe your heating system’s blower fan working, but you aren’t receiving any warmth.

  • The duo of lights display every other fast flashes. This indicates your furnace ignitor may not be working. This piece ignites fuel in your heater to make heat and should be repaired by an expert from Air Alliance Team.

Depend on Us for Skilled Furnace Repair

When you need to have your HVAC equipment fixed quickly, turn to the specialists at Air Alliance Team. Our pros will fix the issue quickly and have your residence feeling cozy again in a short time. Contact us at 636-206-4584 or contact us online to request an appointment today.