Furnace troubleshooting

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

While your Lennox® HVAC equipment isn’t able to speak to you, it possesses a way to get your attention when there’s a furnace error.

Its control panel has double LED lights that can share a fault code. Depending on the issue, your furnace might show continuous or flashing lights.

Though there are some basic heating fixes you can do yourself, many services are best left to experts. When your furnace won’t turn on or give heat, call Moon's Air at 318-215-7938 for professional furnace repair in Shreveport.

Our experts will rapidly spot and fix the fault, even if you don’t use a Lennox heating system. We can fix all types or makes—and get the warmth reintroduced to your home fast.


What Does the Blinking Light on My Heater Mean?

Your furnace depends on lights to flash code when it requires repairs. It also engages these lights to relay it’s heating correctly.

Regular heating involves:

  • Concurrent slow flash—heater running correctly.
  • Concurrent fast flash—heating system is beginning to call for heat.

If you notice a lone light blinking slowly and the other flashing rapidly, your furnace might be experiencing a low flame signal. This can occur even when your heating system is running like it should. It means the flame sensing rod could have build-up or in the bad location on the burner. Contact us at 318-215-7938 for support.

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

Heater Refuses to Kick On

Here are a few of the light sequences you might see when your heat will not or keep heating. The bulk of these errors must be repaired by a technician, such as one from Moon's Air.

  1. Both LED lights are off. This means your heating system might not be receiving power. Look at the breaker box to make sure the heater fuse hasn’t triggered. Attempt to reset the fuse if it is in the “off” spot. If it rapidly flips after a subsequent reset, leave the breaker alone and get in touch with us us at 318-215-7938.
  2. One light is solid and the other is flickering slowly. This means the flame rollout switch is probably open. The switch is an essential safety guard that assists in stopping fires and carbon monoxide. You shouldn’t seek to repair this malfunction on your own.
  3. An individual light is blinking quickly and the other is flickering slowly. This likely means power polarity has been reversed. Your heater might have a wiring problem that needs specialized help from Moon's Air.
  4. The duo of lights are flashing slowly. This means your heater’s blower motor possibly isn’t operating. This component moves hot air from the heater into your rooms. We can help in pinpointing what’s causing a problem with this piece.
  5. A single light is blinking slowly and the other is flashing quickly. This means your HVAC system could have not enough voltage or a short circuit. Get in touch with our specialists at 318-215-7938 for help.
  6. One light is blinking on, on and off while the other flickers on, off, on. This signifies there may be an issue with your furnace’s control panel or wiring. Moon's Air can locate the problem and repair it.
  7. The duo of lights are using alternate slow flashes. This means your HVAC equipment likely has a flame failure. There may be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 318-215-7938 for support.
  8. One light flickers slowly while the other stays continuous. This typically indicates your HVAC system’s limit switch is malfunctioning. The switch stops your heater from becoming too warm. Get in touch with the professionals at Moon's Air for help.

Furnace Blower Operates But No Warmth

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

  • The pair of lights are giving alternating quick blinks. This means your furnace ignitor could be broken. This piece ignites fuel in your heater to make heat and should be repaired by a specialist from Moon's Air.

Turn to Us for Skilled Furnace Repair

When you need to have your heating system repaired without delay, depend on the specialists at Moon's Air. Our pros will take care of the problem right away and have your rooms feeling cozy again soon. Reach out to us at 318-215-7938 or contact us online to get an appointment today.

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