While your Lennox® furnace cannot talk to you, it has a process to get your attention when there’s a furnace error.

Its control board has twin LED lights that can display a fault code. Based on the problem, your furnace might use continuous or flashing lights.

While there are some simple heating adjustments you can do without an expert, many fixes are best handled by experts. When your furnace won’t kick on or provide heated air, get in touch with Gilray Heating and Cooling at 715-301-0727 for experienced furnace repair in Wausau.

Our experts will speedily detect and repair the malfunction, even if you don’t use a Lennox heater. We can repair whichever kinds or models—and get the heat reintroduced to your residence quickly.

What Does the Blinking Light on My Furnace Mean?

Your heating system relies on lights to flash code when it requires repairs. It also engages this system to tell you it’s operating correctly.

Normal heating involves:

  • Simultaneous slow flash—heating system working like it should.
  • Both lights flash fast—heating system is initiating the call for heat.

If you realize that a lone light flashing slowly and the other going on and off quickly, your furnace may have a low flame signal. This can occur even when your heating system is working like it should. It means the flame sensing rod might need to be cleaned or in the bad area on the burner. Contact us at 715-301-0727 for help.

Here are several other of the most common issues for Lennox furnaces.

Furnace Won’t Turn On

Here are a few of the light patterns you may observe when your furnace refuses to or keep heating. The majority of these errors have to be repaired by an expert, like one from Gilray Heating and Cooling.

  1. The duo of LED lights aren’t lit. This signifies your heating system might not be receiving power. Look at the breaker box to ensure the heating system fuse is not triggered. You should reset the fuse if it’s in the “off” spot. If it immediately flips after you reset it, don’t try to reset it again and contact us at 715-301-0727.
  2. One light is unchanging and the other is flashing slowly. This signifies the flame rollout switch is likely not working right. The part is a critical safety mechanism that aids in stopping fires and carbon monoxide. You shouldn’t seek to take care of this fault yourself.
  3. One light is flickering rapidly and the other is flickering slowly. This often means power polarity has been reversed. Your heater might have a wiring fault that requires professional support from Gilray Heating and Cooling.
  4. All lights are blinking slowly. This signifies your furnace’s blower motor probably isn’t working. This piece circulates hot air from the HVAC system into your space. We can help in figuring out what’s causing a problem with this part.
  5. A single light is flickering slowly and the other is flashing fast. This indicates your heater might have low voltage or a short circuit. Call our technicians at 715-301-0727 for assistance.
  6. One light is blinking on, on, off while the other blinks on, off, on. This signifies there could be trouble with your HVAC system’s motherboard or wiring. Gilray Heating and Cooling can determine the issue and repair it.
  7. Both lights display alternate slow blinks. This indicates your heater likely has a flame issue. There may be a problem with its gas supply, gas valve or ignitor control. Contact us at 715-301-0727 for help.
  8. An individual light blinks slowly while the other stays continuous. This usually means your HVAC system’s limit switch is not working. The switch keeps your HVAC system from becoming too warm. Call the professionals at Gilray Heating and Cooling for support.

Furnace Blower Operates But No Warmth

Here’s what might be broken when you hear your heater’s blower fan running, but you aren’t getting any warmth.

  • The duo of lights are showing every other quick flashes. This signifies your furnace ignitor could be broken. This piece kindles fuel in your furnace to create warm air and should be serviced by a specialist from Gilray Heating and Cooling.

Depend on Us for Expert Furnace Repair

When you need to have your heater in working order quickly, depend on the specialists at Gilray Heating and Cooling. Our pros will fix the issue right away and have your rooms feeling relaxing again in no time. Contact us at 715-301-0727 or contact us online to schedule an appointment today.