Furnace troubleshooting

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

While your Lennox® heating system can’t chat with you, it does have a way to communicate a furnace error.

Its motherboard has two LED lights that can share a fault code. Based on the malfunction, your heater may use continuous or flashing lights.

While there are various simple HVAC repairs you can take care of yourself, many fixes are best handled by experts. When your heating system won’t turn on or give heated air, get in touch with Halverson Brothers Inc at 715-352-4052 for experienced furnace repair in Menomonie and western Wisconsin.

Our technicians will speedily diagnose and take care of the fault, even if you don’t have a Lennox heating system. We can repair whichever kinds or models—and get the comfort restored to your residence fast.


What Does the Blinking Light on My Heater Mean?

Your furnace depends on lights to flash code when it requires repairs. It also uses these lights to tell you it’s working properly.

Normal function consists of:

  • Concurrent slow flash—heater operating like it should.
  • Concurrent fast flash—furnace is initiating the call for heat.

If you notice a solitary light blinking slowly and the other flashing quickly, your heater could be experiencing a low flame signal. This can take place even when your heating system is working like it should. It indicates the flame sensing rod might have build-up or in the bad location on the burner. Contact us at 715-352-4052 for support.

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

Heating System Won’t Turn On

Here are some of the light patterns you might notice when your heater refuses to or keep operating. The bulk of these problems need to be handled by an expert, such as one from Halverson Brothers Inc.

  1. All LED lights aren’t lit. This signifies your heating system might not have power. Examine the breaker box to make sure the heating system fuse isn’t triggered. You should reset the fuse if it’s in the “off” position. If it instantly flips after you reset it, don’t try to reset it again and get in touch with us us at 715-352-4052.
  2. A single light is unchanging and the other is blinking slowly. This means the flame rollout switch is possibly open. The part is a critical safety device that helps in stopping fires and carbon monoxide. You shouldn’t seek to handle this problem on your own.
  3. An individual light is flashing rapidly and the other is blinking slowly. This usually signifies power polarity has been transposed. Your heater could have a wiring problem that calls for professional aid from Halverson Brothers Inc.
  4. The pair of lights are flickering slowly. This indicates your heater’s blower motor possibly isn’t operating. This piece moves warm air from the heater into your space. We can aid in pinpointing what’s causing a problem with this piece.
  5. A single light is flickering slowly and the other is blinking rapidly. This signifies your heater might have insufficient voltage or a short circuit. Contact our specialists at 715-352-4052 for support.
  6. One light is flashing on, on and off while the other flashes on, off, on. This signifies there might be a malfunction with your heater’s control board or wiring. Halverson Brothers Inc can determine the error and fix it.
  7. The duo of lights are using alternating slow blinks. This means your heating system may have a flame problem. There could be trouble with its gas supply, gas valve or ignitor control. Reach out to us at 715-352-4052 for help.
  8. One light blinks slowly while the other is continuous. This typically signifies your HVAC equipment’s limit switch is experiencing an error. The switch prevents your heating system from becoming too warm. Call the experts at Halverson Brothers Inc for assistance.

Heater Blower Runs But No Heat

Here’s what could be broken when you observe your heating equipment’s blower fan working, but you aren’t receiving any warm air.

  • The pair of lights are giving every other fast flashes. This signifies your furnace ignitor may be broken. This piece kindles energy in your HVAC equipment to produce warm air and should be serviced by a professional from Halverson Brothers Inc.

Depend on Us for Professional Furnace Repair

When you have to get your heater repaired without delay, depend on the experts at Halverson Brothers Inc. Our pros will handle the fault right away and have your residence feeling comfortable again in a short time. Contact us at 715-352-4052 or contact us online to schedule an appointment now.

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