Furnace troubleshooting

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

While your Lennox® heater cannot chat with you, it has a process to communicate a furnace error.

Its motherboard has a set of LED lights that can show a fault code. Based on the issue, your heater could display continuous or flashing lights.

While there are various basic HVAC fixes you can complete on your own, many services are best left to the professionals. When your furnace will not turn on or put out warmth, call West Jefferson Plumbing and Heating, Inc. at 614-450-1575 for experienced furnace repair in West Jefferson.

Our specialists will quickly diagnose and repair the issue, even if you don’t have a Lennox heating system. We can repair any kinds or configuration—and get the heat reintroduced to your house fast.


What Does the Blinking Light on My Furnace Mean?

Your heater depends on lights to flash code when it needs to be repaired. It also engages this setup to tell you it’s heating like it should.

Correct heating involves:

  • Concurrent slow flash—heater working like it should.
  • Both lights flash fast—furnace is starting to call for heat.

If you realize that one light blinking slowly and the other flashing quickly, your heating system could be having a low flame signal. This can take place even when your furnace is running properly. It means the flame sensing rod may need to be cleaned or in the incorrect location on the burner. Contact us at 614-450-1575 for help.

Here are some of the most typical errors for Lennox furnaces.

Furnace Will Not Kick On

Here are a few of the light sequences you may observe when your heating system refuses to or stay on. The majority of these problems must be taken care of by a professional, for instance from West Jefferson Plumbing and Heating, Inc..

  1. Both LED lights are off. This signifies your HVAC system might not have power. Go to the breaker box to make sure the furnace fuse has not flipped. Try resetting the fuse if it has moved into the “off” area. If it promptly flips after you reset it, don’t try to reset it again and contact us at 614-450-1575.
  2. One light is unchanging and the other is flickering slowly. This means the flame rollout switch is probably open. The component is a critical safety guard that helps in preventing fires and carbon monoxide. You shouldn’t seek to fix this fault on your own.
  3. A single light is flashing rapidly and the other is flickering slowly. This typically signifies power polarity has been reversed. Your heating system might have a wiring problem that calls for specialized help from West Jefferson Plumbing and Heating, Inc..
  4. Both lights are flickering slowly. This signifies your heating system’s blower motor likely isn’t working. This component distributes heated air from the HVAC system into your rooms. We can help in figuring out what’s wrong with this piece.
  5. A single light is blinking slowly and the other is blinking fast. This signifies your heating system might have not enough voltage or a short circuit. Get in touch with our professionals at 614-450-1575 for help.
  6. One light is flashing on, on and off while the other flickers on, off, on. This means there could be trouble with your HVAC system’s motherboard or wiring. West Jefferson Plumbing and Heating, Inc. can determine the error and handle it.
  7. The duo of lights show alternate slow flickers. This indicates your heater likely has a flame failure. There could be trouble with its gas supply, gas valve or ignitor control. Call us at 614-450-1575 for support.
  8. One light flashes slowly while the other stays solid. This typically indicates your HVAC system’s limit switch is experiencing an error. The switch stops your heater from overheating. Get in touch with the specialists at West Jefferson Plumbing and Heating, Inc. for help.

Furnace Blower Operates But No Heat

Here’s what may be broken when you notice your furnace’s blower fan working, but you aren’t gaining any warm air.

  • The duo of lights display alternating quick flashes. This signifies your furnace ignitor could be broken. This part ignites fuel in your heater to make warmth and should be repaired by a specialist from West Jefferson Plumbing and Heating, Inc..

Trust Us for Expert Furnace Repair

When you have to get your HVAC equipment fixed fast, trust the technicians at West Jefferson Plumbing and Heating, Inc.. Our techs will handle the error quickly and have your home feeling comfortable again in a short time. Get in touch with us at 614-450-1575 or contact us online to schedule an appointment right away.

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