While your Lennox® heater can’t speak to you, it possesses a procedure to communicate a furnace error.

Its control board has a set of LED lights that can display a fault code. Based on the fault, your heater could show steady or flashing lights.

Though there are various elementary HVAC adjustments you can do on your own, many fixes are best taken care of by experts. When your furnace refuses to turn on or put out warm air, reach out to Lakeside Heating & Air at 509-284-4265 for experienced furnace repair in Chelan and Wenatchee.

Our experts will swiftly discover and take care of the malfunction, even if you don’t own a Lennox heater. We can service whichever brands or makes—and get the warmth returned to your house quickly.

What Does the Flashing Light on My Heating System Mean?

Your furnace uses lights to flash code when it requires repairs. It also uses this setup to tell you it’s working correctly.

Correct operation involves:

  • Simultaneous slow flash—heating system working properly.
  • Both lights flash fast—heating system is starting to call for heat.

If you see a lone light flashing slowly and the other flashing fast, your furnace could have a low flame signal. This can occur even when your heater is heating like it should. It indicates the flame sensing rod may need to be cleaned or in the incorrect location on the burner. Reach out to us at 509-284-4265 for support.

Here are several other of the most common problems for Lennox heating systems.

Heater Will Not Turn On

Here are many of the light sequences you might notice when your heater refuses to or keep running. Most of these problems have to be fixed by a technician, such as one from Lakeside Heating & Air.

  1. Both LED lights are off. This indicates your heating system might not be receiving power. Examine the breaker box to confirm the heater fuse isn’t triggered. You should reset the fuse if it is in the “off” position. If it rapidly turns off after a subsequent reset, don’t try to reset it again and get in touch with us us at 509-284-4265.
  2. One light is unchanging and the other is blinking slowly. This shows the flame rollout switch is likely not working right. The switch is a critical safety guard that helps in preventing fires and carbon monoxide. You shouldn’t try to handle this fault on your own.
  3. A single light is flickering rapidly and the other is blinking slowly. This typically means power polarity has been reversed. Your furnace might have a wiring error that requires specialized help from Lakeside Heating & Air.
  4. The duo of lights are blinking slowly. This indicates your heater’s blower motor probably isn’t operating. This component distributes hot air from the heating system into your rooms. We can aid in pinpointing what’s causing a problem with this part.
  5. An individual light is blinking slowly and the other is flashing rapidly. This means your heating system might have low voltage or a short circuit. Call our technicians at 509-284-4265 for support.
  6. One light is flickering on, on, off while the other flashes on, off, on. This signifies there may be a malfunction with your HVAC system’s control board or wiring. Lakeside Heating & Air can determine the problem and fix it.
  7. Both lights show every other slow flashes. This signifies your HVAC equipment may have a flame problem. There may be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 509-284-4265 for support.
  8. A single light blinks slowly while the other remains steady. This typically means your heater’s limit switch is not working. The switch keeps your heating system from overheating. Get in touch with the pros at Lakeside Heating & Air for support.

Furnace Blower Works But No Heat

Here’s what could be wrong when you notice your heating system’s blower fan working, but you aren’t receiving any warmth.

  • Both lights are giving every other rapid flickers. This signifies your furnace ignitor could not be in working order. This part ignites energy in your heating system to produce warm air and should be serviced by a specialist from Lakeside Heating & Air.

Turn to Us for Skilled Furnace Repair

When you need to have your heating system in working order without delay, trust the technicians at Lakeside Heating & Air. Our techs will fix the issue quickly and have your house feeling relaxing again in a short time. Reach out to us at 509-284-4265 or contact us online to schedule an appointment right away.