Furnace troubleshooting

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

While your Lennox® heating system cannot talk to you, it possesses a process to communicate a furnace error.

Its control panel has two LED lights that can display a fault code. Depending on the problem, your furnace might display continuous or flashing lights.

Though there are a few simple heating adjustments you can take care of without an expert, many fixes are best left to experts. When your heater won’t kick on or provide heat, get in touch with Alan Energy Services Air Conditioning and Heating Company at 630-570-0252 for professional furnace repair in Elmhurst.

Our experts will rapidly discover and fix the failure, even if you don’t own a Lennox heating system. We can fix whichever types or models—and get the warmth returned to your residence quickly.


What Does the Flickering Light on My Heater Mean?

Your furnace relies on lights to flash code when it needs to be repaired. It also works these lights to relay it’s operating like it should.

Normal operation consists of:

  • Both lights flash slowly—heating system running properly.
  • Concurrent fast flash—heater is beginning to call for heat.

If you notice a single light blinking slowly and the other flashing quickly, your furnace could be experiencing a low flame signal. This can occur even when your furnace is heating correctly. It means the flame sensing rod could be dirty or in the incorrect spot on the burner. Contact us at 630-570-0252 for assistance.

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

Heating System Will Not Turn On

Here are a few of the light arrangements you may see when your heating system will not or keep operating. The majority of these errors must be repaired by a professional, such as one from Alan Energy Services Air Conditioning and Heating Company.

  1. The duo of LED lights aren’t lit. This signifies your HVAC system might not have power. Look at the breaker box to make sure the heating system fuse has not triggered. You should reset the fuse if it’s in the “off” spot. If it immediately trips after a subsequent reset, leave the breaker alone and contact us at 630-570-0252.
  2. One light is solid and the other is flashing slowly. This shows the flame rollout switch is probably not working right. The part is an important safety tool that assists in stopping fires and carbon monoxide. You shouldn’t try to repair this malfunction without professional help.
  3. One light is blinking quickly and the other is flashing slowly. This usually signifies power polarity has been reversed. Your heater could have a wiring error that calls for specialized help from Alan Energy Services Air Conditioning and Heating Company.
  4. Both lights are flickering slowly. This signifies your furnace’s blower motor probably isn’t working. This piece circulates hot air from the heating system into your space. We can aid in figuring out what’s causing an issue with this component.
  5. One light is flickering slowly and the other is flashing quickly. This signifies your heating system may have low voltage or a short circuit. Call our professionals at 630-570-0252 for help.
  6. One light is blinking on, on and off while the other flickers on, off, on. This indicates there may be trouble with your heater’s control panel or wiring. Alan Energy Services Air Conditioning and Heating Company can determine the fault and handle it.
  7. The duo of lights show alternating slow flashes. This signifies your heater likely has a flame failure. There may be a problem with its gas supply, gas valve or ignitor control. Get in touch with us at 630-570-0252 for support.
  8. One light blinks slowly while the other is continuous. This usually indicates your heater’s limit switch is malfunctioning. The switch stops your heater from getting too hot. Contact the specialists at Alan Energy Services Air Conditioning and Heating Company for help.

Furnace Blower Runs But No Warmth

Here’s what may be broken when you hear your heating equipment’s blower fan working, but you aren’t receiving any heat.

  • Both lights are giving alternate rapid flickers. This indicates your furnace ignitor could be broken. This component lights energy in your heating system to produce warmth and should be fixed by an expert from Alan Energy Services Air Conditioning and Heating Company.

Depend on Us for Skilled Furnace Repair

When you need to have your furnace repaired quickly, turn to the technicians at Alan Energy Services Air Conditioning and Heating Company. Our techs will repair the error quickly and have your space feeling comfortable again in no time. Get in touch with us at 630-570-0252 or contact us online to request an appointment right away.

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