Furnace troubleshooting

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

While your Lennox® furnace can’t speak to you, it possesses a procedure to get your attention when there’s a furnace error.

Its control board has double LED lights that can show a fault code. Subject to the failure, your heater might display continuous or flashing lights.

While there are a few basic furnace repairs you can finish on your own, most fixes are best left to HVAC technicians. When your heater will not start or deliver heat, get in touch with Air Temperature Control at 478-202-3170 for skilled furnace repair in Macon.

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

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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 correctly.

Regular operation includes:

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

If you notice a single light going on and off slowly and the other going on and off quickly, your furnace might be experiencing a low flame signal. This can take place even when your heating system is running correctly. It means the flame sensing rod might have build-up or in the incorrect location on the burner. Reach out to us at 478-202-3170 for help.

Here are a few other of the most typical issues for Lennox heating systems.

Heating System Refuses to Start

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

  1. All LED lights are off. This indicates your heating system might not be receiving power. Look at the breaker box to ensure the furnace fuse has not triggered. Try resetting the fuse if it is in the “off” area. If it immediately turns off following a 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 means the flame rollout switch is probably open. The part is an important safety tool that helps in avoiding fires and carbon monoxide. You shouldn’t attempt to take care of this issue on your own.
  3. A single light is blinking fast and the other is blinking slowly. This often means power polarity has been reversed. Your heating system may have a wiring fault that requires specialized help 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 figuring out what’s causing a problem with this piece.
  5. An individual light is flashing slowly and the other is blinking rapidly. This indicates your heating system might have low voltage or a short circuit. Call our professionals at 478-202-3170 for support.
  6. One light is blinking on, on and off while the other flashes on, off, on. This indicates there may be an error with your HVAC system’s control board or wiring. Air Temperature Control can find the issue and take care of it.
  7. The pair of lights are using 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 flickers slowly while the other is solid. This usually signifies your HVAC equipment’s limit switch is experiencing an error. The switch keeps your HVAC system from getting too hot. Reach out to the experts at Air Temperature Control for support.

Heating System Blower Operates But No Heat

Here’s what might be wrong when you hear your furnace’s blower fan working, but you aren’t getting any warm air.

  • The pair of lights are showing alternate rapid flashes. This signifies your furnace ignitor could not be in working order. This part lights energy in your furnace to make warmth and should be fixed by a professional from Air Temperature Control.

Trust Us for Skilled Furnace Repair

When you have to have your furnace fixed fast, depend on the specialists at Air Temperature Control. Our techs will handle the fault without delay and have your home feeling comfortable again in no time. Get in touch with us at 478-202-3170 or contact us online to schedule an appointment right away.

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