While your Lennox® heating system cannot speak to you, it has a procedure to tell you about a furnace error.

Its motherboard has a set of LED lights that can display a fault code. Depending on the failure, your heater might display solid or flashing lights.

While there are some simple furnace fixes you can take care of without an expert, the majority of tasks are best taken care of by HVAC technicians. When your heater refuses to kick on or provide warm air, contact Olde Towne Heating & Air at 843-485-0967 for professional furnace repair in Mount Pleasant.

Our technicians will quickly discover and fix the malfunction, even if you don’t own a Lennox heater. We can fix all kinds or makes—and get the comfort returned to your home fast.

What Does the Flickering Light on My Furnace Mean?

Your furnace uses lights to flash code when it isn’t working right. It also uses these lights to let you know it’s operating properly.

Correct function includes:

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

If you realize that a lone light flashing slowly and the other going on and off quickly, your heating system could have a low flame signal. This can happen even when your furnace is running correctly. It indicates the flame sensing rod could be dirty or in the wrong spot on the burner. Contact us at 843-485-0967 for assistance.

Here are some of the most typical problems for Lennox heating systems.

Heater Will Not Turn On

Here are some of the light sequences you could observe when your heater refuses to or keep running. The bulk of these issues must be repaired by a specialist, for instance from Olde Towne Heating & Air.

  1. The duo of LED lights are off. This signifies your heating system might not have power. Find the breaker box to make sure the heater fuse isn’t tripped. Attempt to reset the fuse if it is in the “off” area. If it immediately flips following a reset, don’t try to reset it again and get in touch with us us at 843-485-0967.
  2. A single light is stable and the other is blinking slowly. This signifies the flame rollout switch is likely open. The part is a critical safety device that assists in preventing fires and carbon monoxide. You shouldn’t seek to take care of this fault without professional help.
  3. A single light is blinking quickly and the other is flashing slowly. This often indicates power polarity has been transposed. Your heater may have a wiring fault that needs specialized assistance from Olde Towne Heating & Air.
  4. Both lights are flashing slowly. This means your heater’s blower motor possibly isn’t working. This component sends warm air from the HVAC system into your rooms. We can aid in figuring out what’s causing an issue with this component.
  5. A single light is blinking slowly and the other is blinking rapidly. This signifies your heating system could have insufficient voltage or a short circuit. Get in touch with our experts at 843-485-0967 for help.
  6. One light is flashing on, on, off while the other flashes on, off, on. This indicates there could be trouble with your heater’s motherboard or wiring. Olde Towne Heating & Air can locate the fault and repair it.
  7. The pair of lights show every other slow blinks. This signifies your HVAC system likely has a flame failure. There might be trouble with its gas supply, gas valve or ignitor control. Call us at 843-485-0967 for support.
  8. A single light blinks slowly while the other remains steady. This usually means your heater’s limit switch is malfunctioning. The switch keeps your heating system from becoming too warm. Get in touch with the experts at Olde Towne Heating & Air for help.

Heater Blower Works But No Warmth

Here’s what might be wrong when you observe your heating equipment’s blower fan on, but you aren’t gaining any warm air.

  • Both lights display alternate rapid flashes. This indicates your furnace ignitor could not be working. This component ignites gas in your heater to produce warmth and should be fixed by a specialist from Olde Towne Heating & Air.

Trust Us for Professional Furnace Repair

When you have to have your heater repaired quickly, trust the experts at Olde Towne Heating & Air. Our technicians will handle the fault quickly and have your residence feeling comfortable again soon. Reach out to us at 843-485-0967 or contact us online to schedule an appointment right away.