Furnace troubleshooting

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

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

Its control panel has twin LED lights that can share a fault code. Subject to the issue, your heater might display continuous or flashing lights.

Though there are certain basic HVAC repairs you can do on your own, many repairs are best left to HVAC technicians. When your furnace won’t start or give heat, reach out to Watts Electrical & Air Conditioning at 601-736-7362 for professional furnace repair in Columbia.

Our specialists will speedily diagnose and take care of the issue, even if you don’t own a Lennox furnace. We can fix any kinds or makes—and get the heat returned to your house fast.


What Does the Flashing Light on My Heater Mean?

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

Regular heating includes:

  • Simultaneous slow flash—heating system running properly.
  • Both lights flash fast—furnace is initiating the call for heat.

If you realize that a solitary light flashing slowly and the other blinking quickly, your heater could have a low flame signal. This can occur even when your furnace is heating like it should. It indicates the flame sensing rod might need to be cleaned or in the incorrect area on the burner. Contact us at 601-736-7362 for assistance.

Here are a few other of the most common errors for Lennox heating systems.

Heater Won’t Turn On

Here are some of the light patterns you could observe when your furnace will not or stay on. The bulk of these problems need to be repaired by a professional, like one from Watts Electrical & Air Conditioning.

  1. The duo of LED lights are extinguished. This means your furnace might not be receiving power. Examine the breaker box to confirm the heater fuse is not triggered. You should reset the fuse if it’s in the “off” position. If it promptly turns off following a reset, don’t try to reset it again and get in touch with us us at 601-736-7362.
  2. A single light is solid and the other is flashing slowly. This signifies the flame rollout switch is may be not working right. The component is an essential safety mechanism that assists in preventing fires and carbon monoxide. You shouldn’t attempt to fix this issue without professional help.
  3. A single light is flashing quickly and the other is flickering slowly. This often indicates power polarity has been reversed. Your heating system may have a wiring error that needs specialized help from Watts Electrical & Air Conditioning.
  4. Both lights are flickering slowly. This signifies your heating system’s blower motor probably isn’t operating. This part distributes warm air from the HVAC system into your rooms. We can aid in pinpointing what’s causing a problem with this piece.
  5. An individual light is flashing slowly and the other is flashing quickly. This signifies your furnace might have low voltage or a short circuit. Call our specialists at 601-736-7362 for assistance.
  6. One light is flashing on, on and off while the other flickers on, off, on. This means there could be a fault with your heater’s control panel or wiring. Watts Electrical & Air Conditioning can find the issue and fix it.
  7. Both lights show every other slow blinks. This signifies your HVAC system may have a flame issue. There could be an issue with its gas supply, gas valve or ignitor control. Reach out to us at 601-736-7362 for support.
  8. One light blinks slowly while the other is continuous. This typically signifies your heater’s limit switch is malfunctioning. The switch keeps your furnace from getting too hot. Reach out to the pros at Watts Electrical & Air Conditioning for assistance.

Heater Blower Works But No Heat

Here’s what might be wrong when you notice your furnace’s blower fan on, but you aren’t receiving any warmth.

  • The pair of lights display every other quick blinks. This means your furnace ignitor could not be working. This piece kindles energy in your furnace to create heat and should be repaired by an expert from Watts Electrical & Air Conditioning.

Turn to Us for Expert Furnace Repair

When you need to have your heating system in working order quickly, turn to the technicians at Watts Electrical & Air Conditioning. Our techs will take care of the issue right away and have your space feeling cozy again soon. Contact us at 601-736-7362 or contact us online to request an appointment now.

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