While your Lennox® HVAC equipment cannot chat with you, it does have a way to get your attention when there’s a furnace error.

Its motherboard has twin LED lights that can show a fault code. Depending on the issue, your furnace may use steady or flashing lights.

Though there are various basic HVAC fixes you can complete on your own, many fixes are best handled by the professionals. When your heater won’t turn on or provide warm air, reach out to TopTec at 847-362-0262 for expert furnace repair in Libertyville.

Our technicians will speedily discover and take care of the breakdown, even if you don’t use a Lennox heating system. We can fix any brands or configuration—and get the heat reintroduced to your residence without delay.

What Does the Flickering Light on My Heater Mean?

Your heater uses lights to flash code when it is malfunctioning. It also engages this system to let you know it’s heating properly.

Correct operation involves:

  • Concurrent slow flash—heater running properly.
  • Concurrent fast flash—heater is initiating the call for heat.

If you realize that a solitary light blinking slowly and the other blinking rapidly, your furnace may be experiencing a low flame signal. This can take place even when your furnace is working like it should. It indicates the flame sensing rod may have buildup or in the incorrect spot on the burner. Contact us at 847-362-0262 for support.

Here are some of the most routine issues for Lennox heaters.

Furnace Refuses to Kick On

Here are many of the light patterns you might observe when your furnace won’t turn on or keep operating. The majority of these problems have to be handled by a professional, like one from TopTec.

  1. Both LED lights are extinguished. This means your heater might not have power. Go to the breaker box to ensure the heating system fuse is not tripped. Try resetting the fuse if it is in the “off” area. If it instantly flips following a reset, don’t touch the breaker and contact us at 847-362-0262.
  2. A single light is stable and the other is flashing slowly. This shows the flame rollout switch is likely open. The switch is an essential safety tool that helps in avoiding fires and carbon monoxide. You shouldn’t attempt to handle this fault yourself.
  3. One light is flickering rapidly and the other is blinking slowly. This likely indicates power polarity has been reversed. Your heating system may have a wiring issue that requires professional assistance from TopTec.
  4. Both lights are flashing slowly. This signifies your heating system’s blower motor probably isn’t operating. This part sends warm air from the heater into your house. We can aid in figuring out what’s wrong with this part.
  5. An individual light is blinking slowly and the other is flickering fast. This means your heater may have low voltage or a short circuit. Contact our technicians at 847-362-0262 for assistance.
  6. One light is flashing on, on, off while the other flashes on, off, on. This means there may be trouble with your heating system’s control panel or wiring. TopTec can determine the problem and fix it.
  7. The duo of lights show alternating slow flickers. This means your heater may have a flame failure. There might be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 847-362-0262 for assistance.
  8. A single light flashes slowly while the other remains steady. This typically means your heating system’s limit switch is not working. The switch prevents your heating system from overheating. Call the experts at TopTec for support.

Furnace Blower Operates But No Warmth

Here’s what may be at fault when you hear your heating equipment’s blower fan running, but you aren’t receiving any warm air.

  • The pair of lights are giving every other quick flashes. This indicates your furnace ignitor might not be in working order. This part lights energy in your heater to make warmth and should be repaired by a technician from TopTec.

Turn to Us for Expert Furnace Repair

When you need to have your HVAC equipment in working order without delay, depend on the professionals at TopTec. Our pros will repair the fault quickly and have your space feeling cozy again in no time. Contact us at 847-362-0262 or contact us online to schedule an appointment right away.