Furnace troubleshooting

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

While your Lennox® heating system can’t chat with you, it possesses a method 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 problem, your heating system could show steady or flashing lights.

Though there are a few basic furnace repairs you can take care of without an expert, most repairs are best taken care of by HVAC technicians. When your heating system will not turn on or give heated air, contact Garoken Energy Co. Inc. at 503-374-1934 for professional furnace repair in Beaverton.

Our specialists will rapidly identify and take care of the failure, even if you don’t own a Lennox heater. We can repair whichever types or models—and get the warmth reintroduced to your home quickly.


What Does the Blinking Light on My Heater Mean?

Your heater depends on lights to flash code when it is malfunctioning. It also works these lights to relay it’s operating correctly.

Normal heating consists of:

  • Simultaneous slow flash—heater operating properly.
  • Concurrent fast flash—heater is initiating the call for heat.

If you notice a lone light flashing slowly and the other flashing fast, your furnace could be having a low flame signal. This can take place even when your heating system is operating like it should. It signifies the flame sensing rod may need to be cleaned or in the wrong area on the burner. Contact us at 503-374-1934 for help.

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

Furnace Will Not Kick On

Here are many of the light arrangements you could see when your furnace refuses to or stay on. The bulk of these errors must be repaired by a professional, like one from Garoken Energy Co. Inc..

  1. All LED lights are extinguished. This means your furnace might not have power. Examine the breaker box to make sure the heater fuse hasn’t flipped. Attempt to reset the fuse if it’s in the “off” area. If it rapidly flips after you reset it, leave the breaker alone and get in touch with us us at 503-374-1934.
  2. One light is unchanging and the other is blinking slowly. This shows the flame rollout switch is likely open. The part is a critical safety tool that assists in avoiding fires and carbon monoxide. You shouldn’t seek to repair this problem without professional help.
  3. One light is blinking quickly and the other is blinking slowly. This typically indicates power polarity has been inverted. Your heater could have a wiring problem that requires professional help from Garoken Energy Co. Inc..
  4. All lights are flashing slowly. This means your heater’s blower motor possibly isn’t working. This part distributes warm air from the heater into your rooms. We can aid in determining what’s causing an issue with this piece.
  5. An individual light is blinking slowly and the other is flashing fast. This signifies your heater may have low voltage or a short circuit. Contact our specialists at 503-374-1934 for support.
  6. One light is flashing on, on and off while the other blinks on, off, on. This indicates there could be an error with your furnace’s control panel or wiring. Garoken Energy Co. Inc. can find the issue and take care of it.
  7. Both lights show every other slow blinks. This indicates your heater possibly has a flame issue. There could be trouble with its gas supply, gas valve or ignitor control. Reach out to us at 503-374-1934 for help.
  8. A single light blinks slowly while the other remains solid. This typically indicates your furnace’s limit switch is experiencing an error. The switch prevents your HVAC system from getting too hot. Call the pros at Garoken Energy Co. Inc. for help.

Heating System Blower Operates But No Heat

Here’s what may be at fault when you observe your heating equipment’s blower fan on, but you aren’t getting any warm air.

  • The pair of lights are showing alternating rapid flickers. This indicates your furnace ignitor may not be in working order. This component ignites energy in your furnace to make warmth and should be repaired by an expert from Garoken Energy Co. Inc..

Trust Us for Skilled Furnace Repair

When you have to get your furnace fixed fast, trust the professionals at Garoken Energy Co. Inc.. Our techs will repair the error without delay and have your home feeling relaxing again in no time. Contact us at 503-374-1934 or contact us online to schedule an appointment today.

Back To Blog