Furnace troubleshooting

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

While your Lennox® HVAC equipment isn’t able to talk to you, it does have a way to tell you about a furnace error.

Its motherboard has twin LED lights that can display a fault code. Based on the problem, your heater could display steady or flashing lights.

Although there are some basic heating repairs you can complete yourself, most tasks are best taken care of by experts. When your heater will not start or give warmth, reach out to Von Deylen Plumbing & Heating Inc. at 419-592-4756 for skilled furnace repair in Napoleon.

Our experts will speedily pinpoint and handle the failure, even if you don’t own a Lennox furnace. We can fix all types or models—and get the comfort returned to your house fast.


What Does the Blinking Light on My Heating System Mean?

Your heating system relies on lights to flash code when it is malfunctioning. It also engages these lights to relay it’s working like it should.

Correct heating consists of:

  • Simultaneous slow flash—heating system heating like it should.
  • Both lights flash fast—furnace is starting to call for heat.

If you realize that a lone light blinking slowly and the other blinking quickly, your heating system may be having a low flame signal. This can happen even when your heater is running correctly. It signifies the flame sensing rod might be dirty or in the bad location on the burner. Reach out to us at 419-592-4756 for help.

Here are a few other of the most routine problems for Lennox furnaces.

Furnace Won’t Turn On

Here are a few of the light patterns you could notice when your heating system will not or keep operating. The majority of these issues must be fixed by a technician, such as one from Von Deylen Plumbing & Heating Inc..

  1. The pair of LED lights aren’t lit. This indicates your heating system might not have power. Examine the breaker box to confirm the heating system fuse isn’t tripped. Try resetting the fuse if it is in the “off” spot. If it immediately trips after you reset it, don’t touch the breaker and contact us at 419-592-4756.
  2. An individual light is solid and the other is flashing slowly. This means the flame rollout switch is probably malfunctioning. The component is a critical safety tool that helps in stopping fires and carbon monoxide. You shouldn’t attempt to fix this fault without professional help.
  3. One light is flickering fast and the other is blinking slowly. This typically indicates power polarity has been inverted. Your furnace may have a wiring fault that needs expert support from Von Deylen Plumbing & Heating Inc..
  4. Both lights are blinking slowly. This means your heating system’s blower motor possibly isn’t operating. This part circulates heated air from the furnace into your space. We can help in determining what’s causing an issue with this piece.
  5. A single light is flashing slowly and the other is blinking quickly. This indicates your heater might have low voltage or a short circuit. Call our experts at 419-592-4756 for support.
  6. One light is blinking on, on and off while the other blinks on, off, on. This means there could be a problem with your heater’s control board or wiring. Von Deylen Plumbing & Heating Inc. can determine the issue and fix it.
  7. The duo of lights are using every other slow flickers. This indicates your heater likely has a flame failure. There could be an issue with its gas supply, gas valve or ignitor control. Reach out to us at 419-592-4756 for help.
  8. One light flickers slowly while the other is continuous. This often means your HVAC equipment’s limit switch is malfunctioning. The switch stops your HVAC system from overheating. Contact the pros at Von Deylen Plumbing & Heating Inc. for help.

Furnace Blower Operates But No Heat

Here’s what could be broken when you notice your heating equipment’s blower fan on, but you aren’t gaining any warm air.

  • The duo of lights are showing alternating fast flashes. This indicates your furnace ignitor might not be in working order. This part ignites fuel in your heater to make warmth and should be serviced by a specialist from Von Deylen Plumbing & Heating Inc..

Depend on Us for Professional Furnace Repair

When you need to get your heater fixed without delay, turn to the professionals at Von Deylen Plumbing & Heating Inc.. Our technicians will repair the problem right away and have your residence feeling relaxing again in a short time. Reach out to us at 419-592-4756 or contact us online to request an appointment now.

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