While your Lennox® heating system cannot talk to you, it possesses a way to communicate a furnace error.

Its control board has twin LED lights that can show a fault code. Based on the fault, your heater could show continuous or flashing lights.

Though there are some simple HVAC adjustments you can take care of yourself, many tasks are best handled by experts. When your heating system will not turn on or deliver heated air, reach out to Morgner Inc. Air Conditioning & Heating at 314-262-4541 for experienced furnace repair in Saint Louis.

Our experts will swiftly determine and repair the problem, even if you don’t have a Lennox heater. We can fix all types or makes—and get the warmth reintroduced to your residence without delay.

What Does the Flickering Light on My Heater Mean?

Your heating system relies on lights to flash code when it isn’t working right. It also works these lights to tell you it’s heating like it should.

Correct function involves:

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

If you see a single light going on and off slowly and the other flashing fast, your heater could have a low flame signal. This can happen even when your heating system is running properly. It indicates the flame sensing rod could have buildup or in the incorrect location on the burner. Contact us at 314-262-4541 for help.

Here are some of the most common errors for Lennox heaters.

Heating System Won’t Kick On

Here are a few of the light patterns you could see when your furnace won’t turn on or keep operating. The bulk of these issues must be repaired by a professional, for instance from Morgner Inc. Air Conditioning & Heating.

  1. Both LED lights are extinguished. This means your heater might not be receiving power. Examine the breaker box to ensure the furnace fuse hasn’t tripped. Try resetting the fuse if it’s in the “off” position. If it rapidly flips following a reset, don’t try to reset it again and call us at 314-262-4541.
  2. An individual light is continuous and the other is flashing slowly. This implies the flame rollout switch is may be open. The switch is an essential safety guard that aids in avoiding fires and carbon monoxide. You shouldn’t attempt to fix this issue without professional help.
  3. An individual light is flickering rapidly and the other is blinking slowly. This likely signifies power polarity has been inverted. Your heater may have a wiring issue that calls for expert assistance from Morgner Inc. Air Conditioning & Heating.
  4. All lights are blinking slowly. This signifies your heating system’s blower motor probably isn’t working. This piece distributes warm air from the heater into your rooms. We can help in pinpointing what’s causing an issue with this component.
  5. One light is blinking slowly and the other is blinking quickly. This indicates your heater could have not enough voltage or a short circuit. Contact our specialists at 314-262-4541 for help.
  6. One light is flashing on, on, off while the other flashes on, off, on. This indicates there might be a malfunction with your HVAC system’s control board or wiring. Morgner Inc. Air Conditioning & Heating can determine the fault and handle it.
  7. Both lights display alternating slow flickers. This signifies your heating system may have a flame problem. There could be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 314-262-4541 for assistance.
  8. A single light flashes slowly while the other remains continuous. This typically means your heating system’s limit switch is malfunctioning. The switch prevents your heating system from becoming too warm. Reach out to the experts at Morgner Inc. Air Conditioning & Heating for support.

Heating System Blower Works But No Warm Air

Here’s what could be broken when you observe your heater’s blower fan working, but you aren’t receiving any warmth.

  • The duo of lights display alternate fast flashes. This means your furnace ignitor could not be working. This component kindles fuel in your HVAC equipment to create warmth and should be serviced by a specialist from Morgner Inc. Air Conditioning & Heating.

Trust Us for Expert Furnace Repair

When you need to get your heater repaired quickly, depend on the technicians at Morgner Inc. Air Conditioning & Heating. Our technicians will handle the issue quickly and have your rooms feeling comfortable again soon. Contact us at 314-262-4541 or contact us online to schedule an appointment now.