Furnace troubleshooting

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

While your Lennox® heating system can’t talk to you, it does have a way to tell you about a furnace error.

Its control panel has twin LED lights that can display a fault code. Based on the fault, your furnace may use steady or flashing lights.

Although there are some elementary heating adjustments you can do without an expert, the majority of repairs are best left to experts. When your heater won’t start or give warmth, contact Assured Appliance and Heating & Air at 847-306-8990 for skilled furnace repair in Genoa.

Our technicians will rapidly detect and repair the fault, even if you don’t use a Lennox heating system. We can fix all kinds or configuration—and get the comfort restored to your house fast.


What Does the Flickering Light on My Heating System Mean?

Your heater relies on lights to flash code when it requires repairs. It also works this system to tell you it’s heating like it should.

Regular function involves:

  • Both lights flash slowly—furnace running like it should.
  • Concurrent fast flash—heater is beginning to call for heat.

If you realize that a single light going on and off slowly and the other flashing fast, your furnace may be experiencing a low flame signal. This can occur even when your furnace is operating like it should. It indicates the flame sensing rod might be dirty or in the wrong spot on the burner. Call us at 847-306-8990 for support.

Here are a few other of the most routine errors for Lennox heating systems.

Heater Won’t Turn On

Here are some of the light arrangements you could observe when your heater won’t turn on or keep running. The bulk of these errors need to be taken care of by a specialist, such as one from Assured Appliance and Heating & Air.

  1. The pair of LED lights aren’t lit. This indicates your HVAC system might not have power. Look at the breaker box to make sure the heating system fuse hasn’t triggered. Try resetting the fuse if it has moved into the “off” position. If it promptly flips after you reset it, don’t touch the breaker and call us at 847-306-8990.
  2. An individual light is continuous and the other is flickering slowly. This signifies the flame rollout switch is possibly open. The switch is an essential safety mechanism that assists in stopping fires and carbon monoxide. You shouldn’t try to handle this malfunction on your own.
  3. An individual light is flickering fast and the other is flickering slowly. This likely means power polarity has been transposed. Your furnace could have a wiring error that calls for professional support from Assured Appliance and Heating & Air.
  4. Both lights are flickering slowly. This means your heating system’s blower motor possibly isn’t operating. This piece moves hot air from the heating system into your residence. We can assist in determining what’s causing an issue with this piece.
  5. An individual light is flashing slowly and the other is flashing quickly. This signifies your furnace could have low voltage or a short circuit. Contact our specialists at 847-306-8990 for help.
  6. One light is flashing on, on and off while the other flickers on, off, on. This signifies there might be a malfunction with your furnace’s motherboard or wiring. Assured Appliance and Heating & Air can determine the problem and take care of it.
  7. The duo of lights display every other slow blinks. This signifies your furnace likely has a flame problem. There might be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 847-306-8990 for assistance.
  8. A single light blinks slowly while the other remains continuous. This typically signifies your heater’s limit switch is malfunctioning. The switch keeps your heater from overheating. Reach out to the experts at Assured Appliance and Heating & Air for support.

Heater Blower Operates But No Warmth

Here’s what could be wrong when you notice your heating system’s blower fan on, but you aren’t receiving any heated air.

  • The pair of lights display alternating rapid flashes. This signifies your furnace ignitor might be broken. This component ignites fuel in your heater to produce warm air and should be fixed by a specialist from Assured Appliance and Heating & Air.

Depend on Us for Professional Furnace Repair

When you need to get your HVAC equipment repaired without delay, turn to the experts at Assured Appliance and Heating & Air. Our techs will fix the issue quickly and have your home feeling cozy again in a short time. Contact us at 847-306-8990 or contact us online to request an appointment today.

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