Furnace troubleshooting

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

While your Lennox® furnace isn’t able to speak to you, it has a method to tell you about a furnace error.

Its control board has double LED lights that can display a fault code. Subject to the issue, your heater might display continuous or flashing lights.

Although there are some simple HVAC adjustments you can finish without an expert, the majority of fixes are best handled by the professionals. When your furnace won’t kick on or give heat, contact The Frazier Company at 402-896-5900 for expert furnace repair in Omaha.

Our specialists will quickly determine and take care of the fault, even if you don’t use a Lennox heating system. We can repair whichever types or configuration—and get the warmth returned to your home fast.

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What Does the Blinking Light on My Heater Mean?

Your heating system relies on lights to flash code when it isn’t working right. It also works these lights to relay it’s working correctly.

Regular operation involves:

  • Simultaneous slow flash—heating system working properly.
  • Simultaneous fast flash—heating system is starting to call for heat.

If you realize that one light going on and off slowly and the other going on and off fast, your heater could have a low flame signal. This can happen even when your heater is running correctly. It indicates the flame sensing rod might have build-up or in the bad location on the burner. Call us at 402-896-5900 for support.

Here are some of the most typical faults for Lennox HVAC systems.

Furnace Refuses to Turn On

Here are some of the light arrangements you might see when your heat refuses to or stay on. Most of these issues have to be fixed by a technician, such as one from The Frazier Company.

  1. The pair of LED lights are off. This means your heater might not have power. Find the breaker box to ensure the heating system fuse isn’t tripped. You should reset the fuse if it is in the “off” area. If it rapidly turns off after you reset it, don’t touch the breaker and get in touch with us us at 402-896-5900.
  2. One light is stable and the other is flickering slowly. This signifies the flame rollout switch is possibly malfunctioning. The switch is a critical safety mechanism that aids in stopping fires and carbon monoxide. You shouldn’t attempt to fix this issue yourself.
  3. One light is flashing quickly and the other is blinking slowly. This typically means power polarity has been inverted. Your heating system could have a wiring issue that calls for professional help from The Frazier Company.
  4. Both lights are flickering slowly. This signifies your heating system’s blower motor likely isn’t working. This piece circulates heated air from the furnace into your residence. We can aid in figuring out what’s causing a problem with this component.
  5. An individual light is flickering slowly and the other is flickering rapidly. This indicates your HVAC system might have not enough voltage or a short circuit. Call our specialists at 402-896-5900 for help.
  6. One light is flashing on, on and off while the other blinks on, off, on. This means there may be an issue with your furnace’s control panel or wiring. The Frazier Company can locate the error and handle it.
  7. The pair of lights are using alternate slow flashes. This indicates your heater likely has a flame issue. There may be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 402-896-5900 for assistance.
  8. A single light flashes slowly while the other stays continuous. This often means your heater’s limit switch is open. The switch keeps your heater from overheating. Contact the pros at The Frazier Company for assistance.

Heater Blower Runs But No Heat

Here’s what could be wrong when you notice your furnace’s blower fan running, but you aren’t gaining any heated air.

  • The duo of lights display every other quick blinks. This indicates your furnace ignitor could not be in working order. This part lights gas in your furnace to make warmth and should be repaired by a specialist from The Frazier Company.

Trust Us for Expert Furnace Repair

When you have to have your heater repaired quickly, trust the experts at The Frazier Company. Our technicians will fix the fault quickly and have your home feeling relaxing again in a short time. Contact us at 402-896-5900 or contact us online to request an appointment right away.

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