While your Lennox® heater isn’t able to speak to you, it has a way to communicate a furnace error.

Its control board has two LED lights that can show a fault code. Subject to the failure, your heater may show steady or flashing lights.

Though there are a few elementary HVAC repairs you can take care of on your own, the majority of repairs are best taken care of by experts. When your furnace refuses to start or provide heat, get in touch with TopTec at 847-362-0262 for skilled furnace repair in Libertyville.

Our specialists will rapidly detect and fix the problem, even if you don’t have a Lennox heater. We can service whichever types or configuration—and get the comfort returned to your house without delay.

What Does the Blinking Light on My Furnace Mean?

Your furnace depends on lights to flash code when it isn’t working right. It also uses this setup to tell you it’s heating like it should.

Correct heating includes:

  • Concurrent slow flash—furnace running correctly.
  • Concurrent fast flash—furnace is starting to call for heat.

If you see a single light going on and off slowly and the other flashing fast, your heater may be experiencing a low flame signal. This can occur even when your heater is operating correctly. It means the flame sensing rod could be dirty or in the incorrect area on the burner. Call us at 847-362-0262 for help.

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

Heater Won’t Kick On

Here are many of the light arrangements you could notice when your heating system refuses to or keep running. Most of these problems have to be taken care of by a professional, like one from TopTec.

  1. Both LED lights are off. This signifies your heater might not be receiving power. Examine the breaker box to confirm the furnace fuse is not tripped. You should reset the fuse if it is in the “off” area. If it immediately trips after a subsequent reset, don’t try to reset it again and get in touch with us us at 847-362-0262.
  2. An individual light is unchanging and the other is flashing slowly. This shows the flame rollout switch is likely open. The component is a critical safety guard that aids in stopping fires and carbon monoxide. You shouldn’t seek to repair this problem yourself.
  3. One light is flashing rapidly and the other is flickering slowly. This often signifies power polarity has been transposed. Your furnace may have a wiring error that requires professional assistance from TopTec.
  4. The pair of lights are blinking slowly. This indicates your heating system’s blower motor likely isn’t working. This component sends warm air from the heater into your rooms. We can aid in determining what’s causing an issue with this piece.
  5. One light is flashing slowly and the other is flickering fast. This means your HVAC system might have low voltage or a short circuit. Call our specialists at 847-362-0262 for support.
  6. One light is flashing on, on, off while the other blinks on, off, on. This means there might be an issue with your HVAC system’s control board or wiring. TopTec can determine the fault and repair it.
  7. Both lights are using every other slow flashes. This means your HVAC equipment possibly has a flame failure. There may be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 847-362-0262 for assistance.
  8. An individual light flashes slowly while the other is continuous. This typically means your HVAC equipment’s limit switch is not working. The switch stops your HVAC equipment from becoming too warm. Call the specialists at TopTec for assistance.

Heating System Blower Operates But No Warmth

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

  • The duo of lights display every other rapid blinks. This indicates your furnace ignitor might not be in working order. This piece lights energy in your heater to produce warmth and should be repaired by a technician from TopTec.

Turn to Us for Skilled Furnace Repair

When you have to get your heating system in working order fast, turn to the technicians at TopTec. Our pros will handle the fault without delay and have your residence feeling cozy again soon. Reach out to us at 847-362-0262 or contact us online to schedule an appointment now.