Furnace troubleshooting

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

While your Lennox® furnace can’t speak to you, it has a procedure to communicate a furnace error.

Its control board has double LED lights that can show a fault code. Based on the failure, your heater could show continuous or flashing lights.

While there are a few basic furnace repairs you can do without an expert, the majority of fixes are best handled by experts. When your heater will not kick on or deliver heat, get in touch with Air Temperature Control at 478-202-3170 for skilled furnace repair in Macon.

Our experts will quickly pinpoint and handle the failure, even if you don’t have a Lennox furnace. We can repair whichever types or makes—and get the warmth returned to your house quickly.


What Does the Blinking Light on My Heater Mean?

Your furnace relies on lights to flash code when it is malfunctioning. It also uses these lights to let you know it’s heating like it should.

Regular operation includes:

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

If you notice a single light blinking slowly and the other going on and off quickly, your furnace could have a low flame signal. This can occur even when your heater is running correctly. It means the flame sensing rod might have build-up or in the incorrect area on the burner. Contact us at 478-202-3170 for assistance.

Here are a few other of the most routine faults for Lennox furnaces.

Heater Will Not Start

Here are some of the light patterns you may notice when your furnace refuses to or stay on. The majority of these errors have to be taken care of by a technician, for instance from Air Temperature Control.

  1. The duo of LED lights are off. This indicates your furnace might not be receiving power. Look at the breaker box to ensure the furnace fuse has not flipped. Try resetting the fuse if it’s in the “off” spot. If it immediately turns off after a subsequent reset, don’t touch the breaker and get in touch with us us at 478-202-3170.
  2. One light is solid and the other is flashing slowly. This shows the flame rollout switch is probably open. The component is an important safety tool that helps in stopping fires and carbon monoxide. You shouldn’t attempt to take care of this issue on your own.
  3. A single light is flickering rapidly and the other is flickering slowly. This often means power polarity has been reversed. Your heater may have a wiring fault that requires specialized support from Air Temperature Control.
  4. All lights are flashing slowly. This indicates your furnace’s blower motor probably isn’t operating. This part sends warm air from the heating system into your house. We can assist in pinpointing what’s causing a problem with this component.
  5. A single light is flashing slowly and the other is flickering rapidly. This indicates your heating system might have low voltage or a short circuit. Reach out to our experts at 478-202-3170 for support.
  6. One light is flickering on, on and off while the other flashes on, off, on. This indicates there may be an error with your furnace’s control board or wiring. Air Temperature Control can find the fault and repair it.
  7. The pair of lights display every other slow flickers. This means your heater possibly has a flame issue. There could be an issue with its gas supply, gas valve or ignitor control. Contact us at 478-202-3170 for help.
  8. An individual light blinks slowly while the other is steady. This usually signifies your HVAC equipment’s limit switch is experiencing an error. The switch stops your furnace from overheating. Reach out to the professionals at Air Temperature Control for support.

Heating System Blower Operates But No Heat

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

  • The pair of lights are giving every other quick flashes. This indicates your furnace ignitor could not be in working order. This part lights energy in your furnace to create warmth and should be fixed by an expert from Air Temperature Control.

Trust Us for Skilled Furnace Repair

When you have to have your heating system fixed without delay, depend on the specialists at Air Temperature Control. Our pros will handle the fault promptly and have your rooms feeling comfortable again in no time. Get in touch with us at 478-202-3170 or contact us online to get an appointment now.

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