Furnace troubleshooting

Top Lennox® Furnace Error Codes (and What They Mean)

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

Its motherboard has a set of LED lights that can show a fault code. Depending on the malfunction, your heating system might display steady or flashing lights.

Although there are certain elementary heating fixes you can take care of yourself, many tasks are best left to experts. When your heating system won’t start or give heated air, call Olde Towne Heating & Air at 843-485-0967 for professional furnace repair in Mount Pleasant.

Our experts will rapidly spot and fix the breakdown, even if you don’t use a Lennox heating system. We can fix whichever kinds or configuration—and get the comfort returned to your house quickly.


What Does the Flashing Light on My Furnace Mean?

Your heating system depends on lights to flash code when it isn’t working right. It also works this setup to relay it’s heating like it should.

Correct function includes:

  • Simultaneous slow flash—heating system operating correctly.
  • Concurrent fast flash—furnace is beginning to call for heat.

If you notice a solitary light flashing slowly and the other blinking quickly, your heater may be having a low flame signal. This can take place even when your furnace is running properly. It indicates the flame sensing rod might need to be cleaned or in the incorrect location on the burner. Reach out to us at 843-485-0967 for help.

Here are some of the most common issues for Lennox furnaces.

Heating System Will Not Start

Here are some of the light arrangements you may observe when your heating system won’t turn on or keep running. The majority of these issues have to be repaired by a specialist, for instance from Olde Towne Heating & Air.

  1. The duo of LED lights aren’t lit. This indicates your heating system might not have electricity. Check the breaker box to ensure the heater fuse is not triggered. Attempt to reset the fuse if it is in the “off” position. If it promptly trips after a subsequent reset, leave the breaker alone and get in touch with us us at 843-485-0967.
  2. One light is stable and the other is flickering slowly. This shows the flame rollout switch is may be not working right. The switch is an important safety guard that helps in stopping fires and carbon monoxide. You shouldn’t attempt to take care of this malfunction on your own.
  3. One light is flickering quickly and the other is flashing slowly. This often signifies power polarity has been transposed. Your heater may have a wiring error that calls for professional help from Olde Towne Heating & Air.
  4. Both lights are flashing slowly. This signifies your heating system’s blower motor probably isn’t working. This component distributes warm air from the heater into your space. We can assist in pinpointing what’s causing an issue with this piece.
  5. An individual light is blinking slowly and the other is flickering quickly. This indicates your HVAC system might have low voltage or a short circuit. Get in touch with our experts at 843-485-0967 for assistance.
  6. One light is flickering on, on and off while the other flickers on, off, on. This means there might be a fault with your heater’s control panel or wiring. Olde Towne Heating & Air can pinpoint the problem and repair it.
  7. Both lights display every other slow blinks. This signifies your heater likely has a flame issue. There may be an issue with its gas supply, gas valve or ignitor control. Contact us at 843-485-0967 for assistance.
  8. One light flickers slowly while the other is solid. This typically indicates your furnace’s limit switch is open. The switch stops your heater from becoming too warm. Call the specialists at Olde Towne Heating & Air for assistance.

Heater Blower Runs But No Warmth

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

  • The duo of lights are giving alternate quick flashes. This indicates your furnace ignitor might not be in working order. This piece kindles fuel in your furnace to create warm air and should be fixed by a professional from Olde Towne Heating & Air.

Turn to Us for Skilled Furnace Repair

When you have to have your HVAC equipment repaired without delay, trust the technicians at Olde Towne Heating & Air. Our techs will take care of the fault right away and have your rooms feeling comfortable again in no time. Contact us at 843-485-0967 or contact us online to schedule an appointment right away.

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