Furnace troubleshooting

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

While your Lennox® HVAC equipment cannot speak to you, it does have a way to get your attention when there’s a furnace error.

Its control panel has double LED lights that can display a fault code. Depending on the problem, your furnace may show steady or flashing lights.

Although there are some simple furnace fixes you can take care of yourself, the majority of services are best taken care of by HVAC technicians. When your furnace refuses to start or provide heated air, get in touch with County Line Mechanical LLC at 717-216-0846 for expert furnace repair in Reinholds.

Our technicians will speedily detect and fix the malfunction, even if you don’t use a Lennox heating system. We can service any types or makes—and get the warmth returned to your residence without delay.


What Does the Blinking Light on My Heating System Mean?

Your furnace uses lights to flash code when it requires repairs. It also uses this system to let you know it’s running correctly.

Regular heating involves:

  • Concurrent slow flash—heater working properly.
  • Simultaneous fast flash—heating system is initiating the call for heat.

If you notice a solitary light going on and off slowly and the other blinking quickly, your heater could be having a low flame signal. This can take place even when your heating system is working properly. It indicates the flame sensing rod may be dirty or in the bad area on the burner. Reach out to us at 717-216-0846 for help.

Here are some of the most routine problems for Lennox heating systems.

Furnace Refuses to Kick On

Here are many of the light arrangements you might see when your furnace refuses to or keep operating. Most of these errors need to be repaired by an expert, for instance from County Line Mechanical LLC.

  1. The pair of LED lights aren’t lit. This means your heater might not have electricity. Check the breaker box to confirm the furnace fuse has not flipped. Try resetting the fuse if it is in the “off” area. If it promptly trips after a subsequent reset, leave the breaker alone and call us at 717-216-0846.
  2. An individual light is continuous and the other is blinking slowly. This signifies the flame rollout switch is likely not working right. The switch is a critical safety device that assists in avoiding fires and carbon monoxide. You shouldn’t seek to repair this malfunction yourself.
  3. A single light is flickering rapidly and the other is blinking slowly. This often indicates power polarity has been transposed. Your heating system may have a wiring error that needs professional assistance from County Line Mechanical LLC.
  4. Both lights are flickering slowly. This indicates your heating system’s blower motor likely isn’t working. This part distributes warm air from the heater into your space. We can help in determining what’s causing an issue with this piece.
  5. A single light is blinking slowly and the other is blinking quickly. This indicates your heater might have low voltage or a short circuit. Get in touch with our professionals at 717-216-0846 for help.
  6. One light is blinking on, on and off while the other flashes on, off, on. This means there may be a problem with your furnace’s control board or wiring. County Line Mechanical LLC can pinpoint the error and repair it.
  7. The pair of lights show alternating slow blinks. This means your HVAC system likely has a flame error. There may be a problem with its gas supply, gas valve or ignitor control. Contact us at 717-216-0846 for assistance.
  8. An individual light flickers slowly while the other stays steady. This often signifies your HVAC equipment’s limit switch is malfunctioning. The switch stops your heating system from getting too hot. Reach out to the specialists at County Line Mechanical LLC for support.

Furnace Blower Runs But No Heat

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

  • The duo of lights display alternating quick flickers. This indicates your furnace ignitor may be broken. This piece ignites fuel in your heating system to produce heat and should be serviced by a professional from County Line Mechanical LLC.

Depend on Us for Expert Furnace Repair

When you need to get your heating system fixed quickly, trust the experts at County Line Mechanical LLC. Our techs will repair the fault promptly and have your space feeling relaxing again in a short time. Call us at 717-216-0846 or contact us online to request an appointment today.

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