Furnace troubleshooting

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

While your Lennox® heater isn’t able to talk to you, it does have a process to communicate a furnace error.

Its control panel has double LED lights that can display a fault code. Based on the malfunction, your heating system may use continuous or flashing lights.

Although there are some simple HVAC repairs you can complete without an expert, most fixes are best taken care of by the professionals. When your heating system won’t turn on or deliver heat, reach out to West Michigan Heating & Air Conditioning Services at (616) 669-3961 for professional furnace repair in Hudsonville.

Our technicians will quickly pinpoint and repair the issue, even if you don’t have a Lennox furnace. We can service all brands or makes—and get the comfort restored to your home fast.


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 these lights to let you know it’s operating correctly.

Normal function involves:

  • Simultaneous slow flash—furnace working correctly.
  • Both lights flash fast—furnace is beginning to call for heat.

If you notice a single light going on and off slowly and the other blinking quickly, your furnace may be having a low flame signal. This can occur even when your heater is running properly. It indicates the flame sensing rod might be dirty or in the incorrect spot on the burner. Call us at (616) 669-3961 for support.

Here are several other of the most routine issues for Lennox heaters.

Heating System Will Not Turn On

Here are a few of the light arrangements you could notice when your heating system will not or keep operating. Most of these issues have to be fixed by a professional, such as one from West Michigan Heating & Air Conditioning Services.

  1. The duo of LED lights aren’t lit. This indicates your heater might not have electricity. Examine the breaker box to make sure the heater fuse has not flipped. You should reset the fuse if it is in the “off” area. If it rapidly turns off following a reset, don’t touch the breaker and contact us at (616) 669-3961.
  2. A single light is continuous and the other is flickering slowly. This implies the flame rollout switch is likely not working right. The part is an essential safety tool that aids in avoiding fires and carbon monoxide. You shouldn’t attempt to repair this malfunction on your own.
  3. A single light is flickering fast and the other is flashing slowly. This typically indicates power polarity has been inverted. Your heater may have a wiring issue that calls for professional aid from West Michigan Heating & Air Conditioning Services.
  4. The pair of lights are flashing slowly. This signifies your heating system’s blower motor probably isn’t running. This component circulates hot air from the HVAC system into your rooms. We can aid in pinpointing what’s causing an issue with this piece.
  5. A single light is flickering slowly and the other is blinking rapidly. This indicates your heater might have not enough voltage or a short circuit. Call our specialists at (616) 669-3961 for support.
  6. One light is flashing on, on and off while the other flashes on, off, on. This signifies there could be a malfunction with your furnace’s control board or wiring. West Michigan Heating & Air Conditioning Services can pinpoint the problem and handle it.
  7. The pair of lights display alternate slow flickers. This signifies your HVAC equipment may have a flame error. There might be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at (616) 669-3961 for assistance.
  8. A single light flickers slowly while the other remains steady. This often signifies your heating system’s limit switch is experiencing an error. The switch keeps your heater from getting too hot. Contact the pros at West Michigan Heating & Air Conditioning Services for help.

Furnace Blower Operates But No Warm Air

Here’s what could be at fault when you notice your heating system’s blower fan working, but you aren’t getting any heat.

  • Both lights display alternate quick flickers. This signifies your furnace ignitor could not be in working order. This piece kindles fuel in your HVAC equipment to create warm air and should be fixed by a professional from West Michigan Heating & Air Conditioning Services.

Turn to Us for Professional Furnace Repair

When you need to get your heater in working order without delay, turn to the technicians at West Michigan Heating & Air Conditioning Services. Our technicians will fix the error promptly and have your house feeling cozy again soon. Get in touch with us at (616) 669-3961 or contact us online to request an appointment now.

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