While your Lennox® heater can’t speak to you, it has a method to get your attention when there’s a furnace error.

Its motherboard has double LED lights that can share a fault code. Based on the fault, your heating system could display continuous or flashing lights.

Although there are various simple furnace adjustments you can complete on your own, many repairs are best handled by the professionals. When your furnace won’t start or deliver heated air, call Gilray Heating and Cooling at 715-301-0727 for experienced furnace repair in Wausau.

Our technicians will speedily identify and repair the malfunction, even if you don’t have a Lennox heater. We can service all brands or makes—and get the comfort returned to your home quickly.

What Does the Blinking Light on My Furnace Mean?

Your heater depends on lights to flash code when it isn’t working right. It also engages this setup to let you know it’s heating correctly.

Correct operation includes:

  • Concurrent slow flash—heater running properly.
  • Both lights flash fast—heater is starting to call for heat.

If you notice a solitary light blinking slowly and the other blinking fast, your heater may be experiencing a low flame signal. This can occur even when your furnace is working properly. It means the flame sensing rod could need to be cleaned or in the wrong area on the burner. Contact us at 715-301-0727 for assistance.

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

Heating System Won’t Kick On

Here are many of the light arrangements you may observe when your heat refuses to or keep operating. The majority of these errors need to be repaired by an expert, like one from Gilray Heating and Cooling.

  1. Both LED lights are off. This means your HVAC system might not have power. Look at the breaker box to confirm the heater fuse hasn’t tripped. You should reset the fuse if it’s in the “off” area. If it immediately flips after you reset it, don’t try to reset it again and get in touch with us us at 715-301-0727.
  2. One light is continuous and the other is blinking slowly. This implies the flame rollout switch is likely open. The switch is a critical safety tool that assists in preventing fires and carbon monoxide. You shouldn’t attempt to take care of this malfunction yourself.
  3. An individual light is flashing fast and the other is flickering slowly. This often means power polarity has been reversed. Your heating system might have a wiring fault that requires professional assistance from Gilray Heating and Cooling.
  4. All lights are flickering slowly. This signifies your furnace’s blower motor likely isn’t operating. This part sends warm air from the furnace into your rooms. We can assist in determining what’s wrong with this piece.
  5. One light is flickering slowly and the other is flashing fast. This signifies your heating system might have insufficient voltage or a short circuit. Contact our experts at 715-301-0727 for support.
  6. One light is flashing on, on, off while the other flashes on, off, on. This signifies there may be an issue with your HVAC system’s control panel or wiring. Gilray Heating and Cooling can locate the problem and handle it.
  7. The pair of lights show alternating slow flashes. This signifies your HVAC equipment likely has a flame failure. There could be trouble with its gas supply, gas valve or ignitor control. Reach out to us at 715-301-0727 for help.
  8. A single light flashes slowly while the other is solid. This often means your heating system’s limit switch is malfunctioning. The switch keeps your heating system from becoming too warm. Reach out to the pros at Gilray Heating and Cooling for assistance.

Heater Blower Runs But No Warmth

Here’s what might be at fault when you observe your heater’s blower fan on, but you aren’t receiving any warm air.

  • Both lights display every other fast flashes. This means your furnace ignitor may not be working. This part kindles fuel in your heating system to produce heat and should be repaired by a specialist from Gilray Heating and Cooling.

Turn to Us for Expert Furnace Repair

When you need to get your heater fixed quickly, trust the professionals at Gilray Heating and Cooling. Our techs will handle the fault without delay and have your space feeling relaxing again in a short time. Get in touch with us at 715-301-0727 or contact us online to request an appointment right away.