Furnace troubleshooting

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

While your Lennox® HVAC equipment can’t speak to you, it possesses a method to tell you about a furnace error.

Its control board has twin LED lights that can share a fault code. Subject to the fault, your heater may show continuous or flashing lights.

While there are various elementary heating adjustments you can complete without an expert, the majority of services are best taken care of by experts. When your furnace won’t turn on or deliver warm air, reach out to Oak Point Heating and Air LLC at 940-202-1202 for expert furnace repair in Denton.

Our specialists will swiftly diagnose and take care of the problem, 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 Flickering Light on My Heating System Mean?

Your furnace depends on lights to flash code when it needs to be repaired. It also works these lights to tell you it’s heating correctly.

Normal heating consists of:

  • Simultaneous slow flash—heating system running properly.
  • Both lights flash fast—furnace is starting to call for heat.

If you see one light flashing slowly and the other blinking quickly, your furnace may be experiencing a low flame signal. This can take place even when your furnace is running properly. It means the flame sensing rod may need to be cleaned or in the bad location on the burner. Contact us at 940-202-1202 for assistance.

Here are several other of the most common errors for Lennox HVAC systems.

Heating System Won’t Turn On

Here are some of the light sequences you may notice when your heater refuses to or stay on. Most of these errors have to be taken care of by a specialist, like one from Oak Point Heating and Air LLC.

  1. All LED lights are extinguished. This indicates your furnace might not have power. Go to the breaker box to ensure the furnace fuse isn’t flipped. Try resetting the fuse if it’s in the “off” area. If it instantly trips after you reset it, leave the breaker alone and contact us at 940-202-1202.
  2. One light is unchanging and the other is blinking slowly. This means the flame rollout switch is likely malfunctioning. The part is an important safety mechanism that assists in avoiding fires and carbon monoxide. You shouldn’t try to handle this fault on your own.
  3. One light is blinking quickly and the other is flashing slowly. This usually signifies power polarity has been inverted. Your heater may have a wiring problem that needs expert aid from Oak Point Heating and Air LLC.
  4. All lights are flashing slowly. This indicates your furnace’s blower motor probably isn’t working. This piece moves heated air from the heating system into your rooms. We can assist in figuring out what’s wrong with this part.
  5. A single light is blinking slowly and the other is flashing fast. This signifies your heating system might have low voltage or a short circuit. Call our experts at 940-202-1202 for support.
  6. One light is flickering on, on and off while the other flashes on, off, on. This signifies there could be an issue with your heater’s control panel or wiring. Oak Point Heating and Air LLC can pinpoint the fault and handle it.
  7. The duo of lights are using alternating slow flickers. This indicates your HVAC system may have a flame error. There could be trouble with its gas supply, gas valve or ignitor control. Reach out to us at 940-202-1202 for help.
  8. A single light flashes slowly while the other stays steady. This usually means your heating system’s limit switch is experiencing an error. The switch keeps your HVAC equipment from becoming too warm. Contact the specialists at Oak Point Heating and Air LLC for assistance.

Heater Blower Operates But No Heat

Here’s what could be at fault when you observe your heater’s blower fan on, but you aren’t getting any warmth.

  • The pair of lights display every other fast blinks. This means your furnace ignitor may be broken. This component lights gas in your HVAC equipment to make warmth and should be repaired by a specialist from Oak Point Heating and Air LLC.

Turn to Us for Skilled Furnace Repair

When you have to have your HVAC equipment repaired fast, trust the experts at Oak Point Heating and Air LLC. Our pros will take care of the issue right away and have your space feeling comfortable again in no time. Contact us at 940-202-1202 or contact us online to request an appointment today.

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