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

December 06, 2019

While your Lennox® heating system can’t chat with you, it does have a process to get your attention when there’s a furnace error.

Its control panel has double LED lights that can show a fault code. Based on the failure, your heating system may display steady or flashing lights.

Though there are some elementary heating fixes you can complete yourself, the majority of repairs are best left to experts. When your heater refuses to start or give warmth, call Farris Heating & Air at 918-333-0376 for experienced furnace repair in Bartlesville.

Our specialists will rapidly spot and repair the breakdown, even if you don’t have a Lennox heater. We can fix all brands or models—and get the heat returned to your house without delay.


What Does the Flickering Light on My Heating System Mean?

Your furnace depends on lights to flash code when it requires repairs. It also works these lights to let you know it’s working properly.

Correct function involves:

  • Concurrent slow flash—heating system running like it should.
  • Simultaneous fast flash—heating system is beginning to call for heat.

If you notice one light going on and off slowly and the other flashing fast, your furnace may be having a low flame signal. This can take place even when your heater is running like it should. It signifies the flame sensing rod may have build-up or in the incorrect location on the burner. Reach out to us at 918-333-0376 for assistance.

Here are several other of the most typical problems for Lennox heating systems.

Heater Refuses to Kick On

Here are a few of the light arrangements you may notice when your heater refuses to or keep running. The bulk of these issues need to be taken care of by a specialist, such as one from Farris Heating & Air.

  1. Both LED lights aren’t lit. This signifies your heating system might not have power. Find the breaker box to ensure the heater fuse is not triggered. You should reset the fuse if it is in the “off” area. If it promptly flips following a reset, leave the breaker alone and get in touch with us us at 918-333-0376.
  2. An individual light is solid and the other is flickering slowly. This means the flame rollout switch is possibly malfunctioning. The switch is an important safety guard that aids in preventing fires and carbon monoxide. You shouldn’t try to fix this fault yourself.
  3. A single light is flashing quickly and the other is flashing slowly. This often indicates power polarity has been reversed. Your heater may have a wiring error that requires professional aid from Farris Heating & Air.
  4. Both lights are flashing slowly. This indicates your heater’s blower motor probably isn’t operating. This component sends hot air from the furnace into your house. We can assist in determining what’s wrong with this piece.
  5. One light is flashing slowly and the other is blinking fast. This indicates your furnace might have not enough voltage or a short circuit. Get in touch with our professionals at 918-333-0376 for help.
  6. One light is flashing on, on and off while the other blinks on, off, on. This indicates there may be an issue with your HVAC system’s motherboard or wiring. Farris Heating & Air can determine the problem and fix it.
  7. The pair of lights display alternate slow flickers. This signifies your furnace possibly has a flame problem. There may be a problem with its gas supply, gas valve or ignitor control. Call us at 918-333-0376 for support.
  8. One light blinks slowly while the other stays continuous. This usually signifies your heater’s limit switch is experiencing an error. The switch prevents your furnace from overheating. Reach out to the pros at Farris Heating & Air for help.

Heating System Blower Runs But No Warmth

Here’s what could be at fault when you notice your heater’s blower fan working, but you aren’t getting any warm air.

  • The pair of lights display every other rapid flickers. This means your furnace ignitor may not be working. This component lights energy in your heater to produce warmth and should be fixed by an expert from Farris Heating & Air.

Trust Us for Expert Furnace Repair

When you need to have your heating system in working order without delay, trust the technicians at Farris Heating & Air. Our techs will repair the issue right away and have your space feeling comfortable again soon. Contact us at 918-333-0376 or contact us online to schedule an appointment today.