Furnace troubleshooting

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

While your Lennox® furnace can’t speak to you, it does have a way to tell you about a furnace error.

Its control board has twin LED lights that can share a fault code. Subject to the issue, your furnace may show solid or flashing lights.

While there are various simple furnace adjustments you can do without an expert, many repairs are best handled by experts. When your heating system will not kick on or deliver warmth, call Turner Brothers Heating & Air Conditioning at 912-208-2470 for professional furnace repair in Saint Marys.

Our technicians will swiftly pinpoint and repair the issue, even if you don’t own a Lennox furnace. We can fix whichever kinds or makes—and get the heat restored to your home without delay.

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What Does the Flashing Light on My Heater Mean?

Your heating system depends on lights to flash code when it requires repairs. It also engages this system to relay it’s working correctly.

Regular function consists of:

  • Both lights flash slowly—heating system running correctly.
  • Concurrent fast flash—heater is initiating the call for heat.

If you notice a single light blinking slowly and the other blinking quickly, your heating system might have a low flame signal. This can occur even when your heater is heating correctly. It indicates the flame sensing rod may be dirty or in the wrong location on the burner. Contact us at 912-208-2470 for assistance.

Here are some of the most typical faults for Lennox HVAC systems.

Heater Will Not Kick On

Here are some of the light sequences you could notice when your furnace will not or keep heating. Most of these errors need to be fixed by a technician, such as one from Turner Brothers Heating & Air Conditioning.

  1. The duo of LED lights are extinguished. This indicates your heating system might not have electricity. Check the breaker box to make sure the heating system fuse isn’t tripped. You should reset the fuse if it has moved into the “off” position. If it immediately turns off after you reset it, don’t try to reset it again and call us at 912-208-2470.
  2. A single light is continuous and the other is flashing slowly. This signifies the flame rollout switch is may be open. The switch is a critical safety guard that assists in stopping fires and carbon monoxide. You shouldn’t try to fix this malfunction without professional help.
  3. A single light is blinking fast and the other is flashing slowly. This often signifies power polarity has been inverted. Your heater might have a wiring error that needs specialized help from Turner Brothers Heating & Air Conditioning.
  4. The pair of lights are blinking slowly. This means your heating system’s blower motor likely isn’t working. This part circulates warm air from the HVAC system into your residence. We can aid in figuring out what’s causing a problem with this piece.
  5. An individual light is blinking slowly and the other is flickering quickly. This signifies your heater could have not enough voltage or a short circuit. Contact our specialists at 912-208-2470 for assistance.
  6. One light is blinking on, on and off while the other flickers on, off, on. This indicates there could be a malfunction with your HVAC system’s motherboard or wiring. Turner Brothers Heating & Air Conditioning can determine the error and repair it.
  7. The pair of lights show every other slow flickers. This means your furnace may have a flame issue. There may be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 912-208-2470 for help.
  8. A single light flickers slowly while the other is continuous. This usually means your heating system’s limit switch is not working. The switch keeps your heater from becoming too warm. Reach out to the professionals at Turner Brothers Heating & Air Conditioning for assistance.

Heater Blower Operates But No Warmth

Here’s what may be broken when you hear your heating system’s blower fan running, but you aren’t getting any heated air.

  • The pair of lights are giving alternate quick flickers. This means your furnace ignitor might be broken. This piece ignites fuel in your furnace to make heat and should be repaired by a technician from Turner Brothers Heating & Air Conditioning.

Trust Us for Skilled Furnace Repair

When you need to have your heating system in working order without delay, trust the professionals at Turner Brothers Heating & Air Conditioning. Our techs will repair the error promptly and have your house feeling cozy again in no time. Get in touch with us at 912-208-2470 or contact us online to request an appointment now.

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