Furnace troubleshooting

Top Lennox® Furnace Error Codes (and What They Mean)

While your Lennox® heating system cannot 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 share a fault code. Based on the malfunction, your heater may use continuous or flashing lights.

Though there are certain basic furnace adjustments you can take care of without an expert, the majority of services are best taken care of by HVAC technicians. When your heating system refuses to kick on or provide warmth, contact Clean Air HVAC at 925-233-6238 for skilled furnace repair in Pacheco.

Our technicians will swiftly discover and repair the malfunction, even if you don’t use a Lennox furnace. We can fix all brands or models—and get the warmth returned to your house without delay.


What Does the Flickering Light on My Heating System Mean?

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

Regular function involves:

  • Both lights flash slowly—furnace working like it should.
  • Both lights flash fast—heater is beginning to call for heat.

If you see a solitary light going on and off slowly and the other going on and off rapidly, your heater may have a low flame signal. This can take place even when your furnace is working correctly. It means the flame sensing rod could be dirty or in the wrong area on the burner. Call us at 925-233-6238 for support.

Here are several other of the most routine faults for Lennox furnaces.

Furnace Refuses to Turn On

Here are a few of the light sequences you may notice when your heater will not or stay on. The majority of these errors have to be taken care of by a technician, for instance from Clean Air HVAC.

  1. The duo of LED lights are off. This indicates your heater might not be receiving power. Go to the breaker box to confirm the heater fuse hasn’t tripped. You should reset the fuse if it has moved into the “off” position. If it instantly flips after a subsequent reset, don’t try to reset it again and contact us at 925-233-6238.
  2. One light is continuous and the other is blinking slowly. This signifies the flame rollout switch is likely malfunctioning. The part is a critical safety guard that helps in avoiding fires and carbon monoxide. You shouldn’t try to take care of this fault on your own.
  3. An individual light is flashing quickly and the other is flickering slowly. This usually means power polarity has been reversed. Your furnace may have a wiring error that requires professional assistance from Clean Air HVAC.
  4. The pair of lights are blinking slowly. This means your heating system’s blower motor possibly isn’t working. This part distributes hot air from the furnace into your home. We can aid in pinpointing what’s causing an issue with this component.
  5. An individual light is flickering slowly and the other is flickering fast. This indicates your heating system could have insufficient voltage or a short circuit. Get in touch with our experts at 925-233-6238 for support.
  6. One light is flashing on, on and off while the other blinks on, off, on. This means there might be an issue with your heating system’s motherboard or wiring. Clean Air HVAC can locate the issue and take care of it.
  7. The pair of lights show alternating slow flickers. This means your HVAC equipment may have a flame problem. There might be an issue with its gas supply, gas valve or ignitor control. Call us at 925-233-6238 for support.
  8. One light flickers slowly while the other remains solid. This usually indicates your HVAC equipment’s limit switch is malfunctioning. The switch keeps your heating system from overheating. Get in touch with the experts at Clean Air HVAC for assistance.

Furnace Blower Runs But No Heat

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

  • The duo of lights are giving alternating quick blinks. This signifies your furnace ignitor may not be in working order. This part kindles energy in your HVAC equipment to make warm air and should be serviced by a technician from Clean Air HVAC.

Trust Us for Expert Furnace Repair

When you need to have your HVAC equipment fixed fast, depend on the technicians at Clean Air HVAC. Our pros will fix the problem quickly and have your home feeling relaxing again in no time. Reach out to us at 925-233-6238 or contact us online to request an appointment today.

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