Furnace troubleshooting

Most Common Lennox® Furnace Error Codes (and What They Mean)

While your Lennox® furnace isn’t able to chat with you, it has a way to communicate a furnace error.

Its control panel has a set of LED lights that can share a fault code. Depending on the malfunction, your heating system could show solid or flashing lights.

Though there are certain elementary HVAC adjustments you can take care of yourself, many tasks are best handled by experts. When your heater won’t start or provide heat, call Olde Towne Heating & Air at 843-485-0967 for professional furnace repair in Mount Pleasant.

Our specialists will rapidly spot and fix the breakdown, even if you don’t own a Lennox heating system. We can fix whichever kinds or configuration—and get the comfort returned to your house without delay.


What Does the Flickering Light on My Furnace Mean?

Your heater relies on lights to flash code when it isn’t working right. It also works this system to relay it’s heating correctly.

Regular function includes:

  • Concurrent slow flash—heating system working correctly.
  • Concurrent fast flash—furnace is starting to call for heat.

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

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

Heating System Refuses to Kick On

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 problems 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 be receiving power. Find the breaker box to confirm the heating system fuse is not flipped. Try resetting the fuse if it is in the “off” position. If it promptly trips following a 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 avoiding fires and carbon monoxide. You shouldn’t try to take care of this malfunction on your own.
  3. One light is blinking quickly and the other is flashing slowly. This often signifies power polarity has been transposed. Your heater may have a wiring fault that calls for professional support from Olde Towne Heating & Air.
  4. The pair of lights are flashing slowly. This indicates your heater’s blower motor probably isn’t working. This piece distributes warm air from the furnace into your space. We can aid in pinpointing what’s causing an issue with this component.
  5. An individual light is flickering slowly and the other is blinking quickly. This signifies your HVAC system could have low voltage or a short circuit. Get in touch with our experts at 843-485-0967 for assistance.
  6. One light is blinking on, on and off while the other blinks on, off, on. This means there could be a fault with your heater’s motherboard or wiring. Olde Towne Heating & Air can pinpoint the problem and repair it.
  7. Both lights are using alternate slow flickers. This signifies your heater possibly has a flame failure. There may be trouble with its gas supply, gas valve or ignitor control. Contact us at 843-485-0967 for assistance.
  8. One light blinks slowly while the other is solid. This often indicates your furnace’s limit switch is malfunctioning. The switch stops your heating system from becoming too warm. Call the specialists at Olde Towne Heating & Air for assistance.

Heater Blower Runs But No Warmth

Here’s what might be wrong when you notice your heating equipment’s blower fan running, but you aren’t getting any heat.

  • The duo of lights are giving alternate rapid flashes. This indicates your furnace ignitor might not be in working order. This piece lights gas in your heating system to create warmth and should be repaired by a professional from Olde Towne Heating & Air.

Turn to Us for Professional Furnace Repair

When you have to have your HVAC equipment repaired fast, 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 get an appointment right away.

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