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 procedure to communicate a furnace error.

Its motherboard has twin LED lights that can display a fault code. Subject to the malfunction, your heater may use continuous or flashing lights.

Though there are some basic HVAC repairs you can complete without an expert, the majority of fixes are best taken care of by the professionals. When your heater won’t turn on or deliver heated air, 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 take care of the failure, even if you don’t have a Lennox furnace. We can repair whichever brands or models—and get the warmth restored to your home fast.


What Does the Flashing Light on My Heating System Mean?

Your heating system uses lights to flash code when it is malfunctioning. It also engages these lights to let you know it’s operating like it should.

Normal function involves:

  • Concurrent slow flash—heater operating correctly.
  • Simultaneous fast flash—heating system is starting to call for heat.

If you notice a single light blinking slowly and the other going on and off quickly, your furnace may be having a low flame signal. This can take place even when your heating system is running like it should. 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 some of the most typical faults for Lennox heaters.

Heating System Refuses to Turn On

Here are a few of the light arrangements you might notice when your heating system refuses to or keep operating. The bulk of these issues have to be fixed by an expert, like one from West Michigan Heating & Air Conditioning Services.

  1. The duo of LED lights aren’t lit. This indicates your heater might not be receiving power. Examine the breaker box to make sure the heating system fuse has not flipped. You should reset the fuse if it’s 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. An individual light is continuous and the other is blinking slowly. This implies the flame rollout switch is probably not working right. The component is a critical safety mechanism that aids in avoiding fires and carbon monoxide. You shouldn’t try to repair this malfunction without professional help.
  3. A single light is blinking 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. Both lights are flashing slowly. This signifies your heating system’s blower motor probably isn’t operating. This piece circulates heated air from the HVAC system into your rooms. We can aid in pinpointing what’s causing a problem with this component.
  5. A single light is flickering slowly and the other is blinking fast. This signifies your furnace could have insufficient voltage or a short circuit. Reach out to our specialists at (616) 669-3961 for assistance.
  6. One light is flashing on, on and off while the other flashes on, off, on. This signifies there might be a malfunction with your furnace’s control board or wiring. West Michigan Heating & Air Conditioning Services can find the problem and handle it.
  7. The duo of lights display every other slow flickers. This signifies your furnace may have a flame error. There may be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at (616) 669-3961 for assistance.
  8. An individual light blinks slowly while the other stays solid. This typically signifies your furnace’s limit switch is experiencing an error. The switch stops your heater from overheating. Contact the pros at West Michigan Heating & Air Conditioning Services for help.

Furnace Blower Operates But No Warmth

Here’s what could be broken when you hear your furnace’s blower fan working, but you aren’t getting any warm air.

  • Both lights display every other rapid blinks. This signifies your furnace ignitor could not be in working order. This component kindles gas in your HVAC equipment to create warm air and should be repaired by a professional from West Michigan Heating & Air Conditioning Services.

Turn to Us for Professional Furnace Repair

When you need to have your heater repaired without delay, turn to the technicians at West Michigan Heating & Air Conditioning Services. Our technicians will take care of the problem 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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