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

While your Lennox® heater can’t talk to you, it has a process to get your attention when there’s a furnace error.

Its control panel has two LED lights that can display a fault code. Depending on the failure, your heating system could show continuous or flashing lights.

Although there are a few basic HVAC adjustments you can finish without an expert, most fixes are best-taken care of by professionals. When your heating system will not turn on or put out warmth, get in touch with Tokay at (209) 257-3156 for skilled furnace repair in Lodi.

Our specialists will speedily detect and take care of the malfunction, even if you don’t own a Lennox heater. We can service whichever brands or makes—and get the comfort reintroduced to your home without delay.

What Does The Flickering Light On My Heating System Mean?

Your furnace uses lights to flash code when it is malfunctioning. It also engages this setup to tell you it’s heating properly.

Regular heating includes:

  • Concurrent slow flash—furnace operating like it should.
  • Concurrent fast flash—heater is initiating the call for heat.

If you realize that a lone light flashing slowly and the other going on and off fast, your furnace could be experiencing a low flame signal. This can happen even when your furnace is running properly. It indicates the flame sensing rod may need to be cleaned or in the wrong area on the burner. Reach out to us at (209) 257-3156 for help.

Here are some of the most typical faults for Lennox heaters.

Furnace Will Not Kick On

Here are a few of the light sequences you might see when your heater will not or keep running. The majority of these problems need to be taken care of by a professional, such as one from Tokay.

  1. All LED lights aren’t lit. This means your HVAC system might not have electricity. Go to the breaker box to make sure the furnace fuse has not flipped. You should reset the fuse if it is in the “off” spot. If it rapidly trips following a reset, don’t try to reset it again, and contact us at (209) 257-3156.
  2. A single light is unchanging and the other is flickering slowly. This signifies the flame rollout switch is may be not working right. The part is a critical safety tool that helps in stopping fires and carbon monoxide. You shouldn’t seek to repair this problem yourself.
  3. One light is blinking rapidly and the other is flickering slowly. This typically means power polarity has been transposed. Your heating system might have a wiring error that needs expert help from Tokay.
  4. Both lights are blinking slowly. This indicates your furnace’s blower motor probably isn’t running. This piece moves heated air from the HVAC system into your residence. We can help in determining what’s causing an issue with this component.
  5. A single light is flickering slowly and the other is flickering rapidly. This signifies your heater may have low voltage or a short circuit. Call our experts at 209-257-3156 for support.
  6. One light is blinking on, on, off while the other blinks on, off, and on. This signifies there might be trouble with your heating system’s motherboard or wiring. Tokay can determine the error and fix it.
  7. Both lights display alternating slow flickers. This means your HVAC equipment may have a flame error. There might be trouble with its gas supply, gas valve or ignitor control. Call us at 209-257-3156 for assistance.
  8. An individual light flickers slowly while the other remains continuous. This often indicates your heating system’s limit switch is malfunctioning. The switch keeps your HVAC system from getting too hot. Call the specialists at Tokay for help.

Heater Blower Runs But No Heat

Here’s what might be wrong when you observe your heating equipment’s blower fan working, but you aren’t gaining any warm air.

  • The pair of lights display alternate fast flickers. This means your furnace ignitor might be broken. This part lights fuel in your heating system to create warm air and should be serviced by an expert from Tokay.

Depend On Us For Expert Furnace Repair

When you have to have your heating system fixed fast, turn to the specialists at Tokay. Our pros will take care of the issue without delay and have your house feeling comfortable again in a short time. Reach out to us at (209) 257-3156 or contact us online to get an appointment now.