While your Lennox® heating system cannot chat with you, it has a procedure to get your attention when there’s a furnace error.

Its control board has double LED lights that can share a fault code. Based on the issue, your heater could use solid or flashing lights.

Though there are a few basic HVAC repairs you can complete yourself, most tasks are best taken care of by experts. When your furnace will not turn on or put out heat, get in touch with Better Air at 507-663-1208 for experienced furnace repair in Dundas and Northfield.

Our specialists will quickly determine and repair the malfunction, even if you don’t own a Lennox heater. We can service all brands or makes—and get the warmth returned to your house without delay.

What Does the Flickering Light on My Furnace Mean?

Your heater relies on lights to flash code when it isn’t working right. It also works this system to tell you it’s operating correctly.

Correct function consists of:

  • Concurrent slow flash—furnace heating properly.
  • Simultaneous fast flash—heating system is initiating the call for heat.

If you see a single light flashing slowly and the other blinking quickly, your heater could have a low flame signal. This can happen even when your furnace is running correctly. It signifies the flame sensing rod might have buildup or in the bad location on the burner. Contact us at 507-663-1208 for support.

Here are some of the most common errors for Lennox HVAC systems.

Heater Won’t Start

Here are many of the light sequences you may observe when your heat will not or keep heating. The majority of these issues need to be fixed by a specialist, for instance from Better Air.

  1. The duo of LED lights are off. This indicates your heater might not have electricity. Go to the breaker box to make sure the heater fuse has not flipped. You should reset the fuse if it’s in the “off” spot. If it rapidly turns off after a subsequent reset, don’t try to reset it again and contact us at 507-663-1208.
  2. One light is unchanging and the other is blinking slowly. This shows the flame rollout switch is may be not working right. The part is a critical safety mechanism that helps in stopping fires and carbon monoxide. You shouldn’t try to take care of this problem on your own.
  3. A single light is flickering quickly and the other is flashing slowly. This likely signifies power polarity has been transposed. Your heating system might have a wiring fault that calls for specialized assistance from Better Air.
  4. The duo of lights are flickering slowly. This signifies your heating system’s blower motor probably isn’t operating. This part moves warm air from the heater into your house. We can aid in pinpointing what’s causing an issue with this part.
  5. An individual light is flickering slowly and the other is blinking quickly. This signifies your HVAC system might have insufficient voltage or a short circuit. Contact our specialists at 507-663-1208 for help.
  6. One light is flashing on, on, off while the other blinks on, off, on. This means there might be an issue with your heater’s motherboard or wiring. Better Air can find the error and repair it.
  7. Both lights show alternate slow blinks. This means your HVAC system likely has a flame problem. There could be a problem with its gas supply, gas valve or ignitor control. Get in touch with us at 507-663-1208 for support.
  8. A single light flickers slowly while the other is continuous. This often signifies your HVAC system’s limit switch is not working. The switch keeps your heating system from getting too hot. Call the experts at Better Air for assistance.

Heating System Blower Works But No Heat

Here’s what could be at fault when you observe your heater’s blower fan running, but you aren’t getting any warm air.

  • Both lights display every other quick flickers. This means your furnace ignitor could be broken. This piece lights gas in your furnace to create warmth and should be serviced by a technician from Better Air.

Turn to Us for Skilled Furnace Repair

When you have to get your HVAC equipment in working order fast, depend on the technicians at Better Air. Our technicians will handle the error quickly and have your house feeling comfortable again soon. Get in touch with us at 507-663-1208 or contact us online to schedule an appointment now.