Furnace troubleshooting

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

While your Lennox® heater cannot chat with you, it has a process to tell you about a furnace error.

Its motherboard has a set of LED lights that can show a fault code. Subject to the issue, your furnace may show continuous or flashing lights.

Although there are some basic HVAC adjustments you can finish yourself, many services are best taken care of by the professionals. When your heater won’t start or deliver warm air, contact Scott Temperature at 785-269-0465 for skilled furnace repair in Lawrence.

Our technicians will speedily pinpoint and handle the breakdown, even if you don’t use a Lennox heating system. We can service whichever types or configuration—and get the heat reintroduced to your residence fast.


What Does the Blinking Light on My Heating System Mean?

Your furnace relies on lights to flash code when it is malfunctioning. It also works these lights to relay it’s operating properly.

Regular operation includes:

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

If you realize that one light blinking slowly and the other flashing fast, your heating system could have a low flame signal. This can occur even when your furnace is running like it should. It means the flame sensing rod could be dirty or in the wrong area on the burner. Reach out to us at 785-269-0465 for help.

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

Heater Won’t Kick On

Here are some of the light arrangements you may see when your heating system won’t turn on or keep heating. The bulk of these issues must be taken care of by a professional, like one from Scott Temperature.

  1. The duo of LED lights are off. This indicates your HVAC system might not have power. Look at the breaker box to make sure the furnace fuse has not triggered. Attempt to reset the fuse if it is in the “off” area. If it promptly trips after you reset it, don’t touch the breaker and get in touch with us us at 785-269-0465.
  2. A single light is stable and the other is blinking slowly. This implies the flame rollout switch is may be not working right. The part is an important safety device that aids in avoiding fires and carbon monoxide. You shouldn’t try to repair this issue yourself.
  3. An individual light is blinking rapidly and the other is flickering slowly. This likely means power polarity has been reversed. Your heater might have a wiring problem that requires specialized help from Scott Temperature.
  4. All lights are blinking slowly. This means your heating system’s blower motor likely isn’t working. This part distributes hot air from the furnace into your residence. We can help in figuring out what’s wrong with this part.
  5. An individual light is flickering slowly and the other is flickering quickly. This signifies your heating system could have low voltage or a short circuit. Reach out to our experts at 785-269-0465 for assistance.
  6. One light is blinking on, on and off while the other flashes on, off, on. This means there could be trouble with your heating system’s control panel or wiring. Scott Temperature can locate the fault and handle it.
  7. The duo of lights display alternating slow flickers. This signifies your HVAC equipment may have a flame failure. There may be trouble with its gas supply, gas valve or ignitor control. Contact us at 785-269-0465 for help.
  8. A single light flickers slowly while the other remains solid. This often means your furnace’s limit switch is open. The switch prevents your heater from getting too hot. Call the pros at Scott Temperature for help.

Heating System Blower Runs But No Warm Air

Here’s what might be at fault when you hear your heating equipment’s blower fan working, but you aren’t gaining any warmth.

  • The pair of lights are showing alternate quick blinks. This signifies your furnace ignitor may not be working. This part lights fuel in your heating system to create heat and should be fixed by an expert from Scott Temperature.

Depend on Us for Skilled Furnace Repair

When you need to have your heating system fixed fast, turn to the experts at Scott Temperature. Our pros will handle the problem right away and have your space feeling cozy again soon. Call us at 785-269-0465 or contact us online to schedule an appointment today.

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