While your Lennox® furnace can’t talk to you, it possesses a way to tell you about a furnace error.

Its control panel has a set of LED lights that can display a fault code. Based on the failure, your heating system could use continuous or flashing lights.

Although there are a few basic HVAC repairs you can finish yourself, the majority of tasks are best left to HVAC technicians. When your heating system refuses to turn on or give heat, call B & B Heating & Cooling at 314-325-7552 for expert furnace repair in Florissant and St. Charles.

Our experts will quickly detect and repair the breakdown, even if you don’t own a Lennox heater. We can fix all types or configuration—and get the warmth returned to your home quickly.

What Does the Flickering Light on My Heating System Mean?

Your heating system relies on lights to flash code when it requires repairs. It also engages this setup to let you know it’s operating properly.

Correct function includes:

  • Simultaneous slow flash—heating system running properly.
  • Simultaneous fast flash—heater is initiating the call for heat.

If you notice a lone light blinking slowly and the other going on and off fast, your heater might be having a low flame signal. This can occur even when your heating system is working properly. It means the flame sensing rod might need to be cleaned or in the wrong location on the burner. Call us at 314-325-7552 for assistance.

Here are several other of the most common faults for Lennox HVAC systems.

Heating System Will Not Start

Here are a few of the light arrangements you might observe when your furnace will not or keep operating. The bulk of these problems must be fixed by a professional, for instance from B & B Heating & Cooling.

  1. Both LED lights are extinguished. This signifies your heater might not have power. Examine the breaker box to confirm the heating system fuse isn’t tripped. Try resetting the fuse if it’s in the “off” spot. If it immediately flips after you reset it, don’t touch the breaker and call us at 314-325-7552.
  2. A single light is stable and the other is flickering slowly. This shows the flame rollout switch is may be open. The switch is an essential safety device that helps in stopping fires and carbon monoxide. You shouldn’t try to handle this malfunction yourself.
  3. A single light is blinking rapidly and the other is blinking slowly. This likely signifies power polarity has been transposed. Your heating system could have a wiring issue that needs specialized help from B & B Heating & Cooling.
  4. Both lights are flashing slowly. This signifies your heating system’s blower motor possibly isn’t operating. This component circulates hot air from the HVAC system into your home. We can aid in figuring out what’s causing an issue with this component.
  5. An individual light is flashing slowly and the other is flashing rapidly. This means your heater might have not enough voltage or a short circuit. Contact our experts at 314-325-7552 for assistance.
  6. One light is flashing on, on, off while the other flickers on, off, on. This indicates there could be an issue with your heater’s control panel or wiring. B & B Heating & Cooling can locate the issue and take care of it.
  7. The duo of lights are using every other slow flickers. This signifies your heating system possibly has a flame problem. There may be a problem with its gas supply, gas valve or ignitor control. Contact us at 314-325-7552 for support.
  8. An individual light flashes slowly while the other is steady. This often indicates your heater’s limit switch is experiencing an error. The switch prevents your heater from overheating. Get in touch with the experts at B & B Heating & Cooling for support.

Heater Blower Runs But No Warmth

Here’s what may be at fault when you hear your heating system’s blower fan on, but you aren’t gaining any warmth.

  • Both lights are giving every other rapid flashes. This signifies your furnace ignitor may not be working. This piece lights gas in your heating system to make heat and should be repaired by an expert from B & B Heating & Cooling.

Trust Us for Professional Furnace Repair

When you need to get your HVAC equipment repaired quickly, trust the experts at B & B Heating & Cooling. Our pros will take care of the issue right away and have your rooms feeling cozy again in a short time. Get in touch with us at 314-325-7552 or contact us online to get an appointment today.