Furnace troubleshooting

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

While your Lennox® heater can’t chat with you, it has a method to tell you about a furnace error.

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

While there are certain basic furnace adjustments you can do yourself, the majority of services are best left to experts. When your heating system refuses to start or give heated air, contact Jack's Heating, Cooling, Stoves & Fireplaces at 308-646-3827 for professional furnace repair in Alliance.

Our experts will speedily spot and take care of the problem, even if you don’t use a Lennox furnace. We can fix any brands or models—and get the warmth restored to your residence without delay.


What Does the Flickering Light on My Heater Mean?

Your heating system uses lights to flash code when it needs to be repaired. It also uses this system to let you know it’s working properly.

Correct function involves:

  • Concurrent slow flash—furnace heating like it should.
  • Simultaneous fast flash—heater is beginning to call for heat.

If you see a solitary light flashing slowly and the other blinking fast, your heater may be experiencing a low flame signal. This can occur even when your furnace is operating properly. It means the flame sensing rod could be dirty or in the incorrect location on the burner. Reach out to us at 308-646-3827 for support.

Here are some of the most typical faults for Lennox furnaces.

Furnace Won’t Kick On

Here are some of the light arrangements you may notice when your heat won’t turn on or keep running. Most of these errors must be handled by a professional, like one from Jack's Heating, Cooling, Stoves & Fireplaces.

  1. The pair of LED lights are off. This signifies your heating system might not be receiving power. Find the breaker box to ensure the heating system fuse is not triggered. Try resetting the fuse if it is in the “off” spot. If it immediately trips after you reset it, leave the breaker alone and get in touch with us us at 308-646-3827.
  2. A single light is continuous and the other is blinking slowly. This shows the flame rollout switch is may be malfunctioning. The switch is a critical safety mechanism that assists in avoiding fires and carbon monoxide. You shouldn’t seek to take care of this issue on your own.
  3. An individual light is blinking quickly and the other is flashing slowly. This often indicates power polarity has been transposed. Your heater could have a wiring issue that needs expert help from Jack's Heating, Cooling, Stoves & Fireplaces.
  4. The duo of lights are flickering slowly. This means your heating system’s blower motor possibly isn’t running. This component circulates hot air from the heater into your residence. We can help in determining what’s wrong with this piece.
  5. An individual light is blinking slowly and the other is flickering rapidly. This indicates your heating system may have insufficient voltage or a short circuit. Contact our specialists at 308-646-3827 for support.
  6. One light is blinking on, on and off while the other flashes on, off, on. This means there may be a malfunction with your HVAC system’s motherboard or wiring. Jack's Heating, Cooling, Stoves & Fireplaces can determine the error and fix it.
  7. Both lights are using alternating slow flickers. This means your furnace likely has a flame failure. There could be a problem with its gas supply, gas valve or ignitor control. Call us at 308-646-3827 for assistance.
  8. One light blinks slowly while the other is steady. This typically signifies your HVAC system’s limit switch is experiencing an error. The switch keeps your heating system from getting too hot. Call the pros at Jack's Heating, Cooling, Stoves & Fireplaces for support.

Heater Blower Runs But No Warmth

Here’s what may be broken when you notice your heating system’s blower fan on, but you aren’t gaining any heat.

  • The duo of lights are giving alternating rapid flashes. This indicates your furnace ignitor could not be working. This part lights energy in your heater to make warmth and should be repaired by an expert from Jack's Heating, Cooling, Stoves & Fireplaces.

Depend on Us for Professional Furnace Repair

When you have to get your furnace in working order without delay, depend on the specialists at Jack's Heating, Cooling, Stoves & Fireplaces. Our technicians will take care of the fault quickly and have your house feeling relaxing again in a short time. Call us at 308-646-3827 or contact us online to get an appointment right away.

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