Furnace troubleshooting

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

While your Lennox® HVAC equipment can’t speak to you, it does have a way to get your attention when there’s a furnace error.

Its motherboard has double LED lights that can show a fault code. Subject to the problem, your furnace might display continuous or flashing lights.

While there are various basic HVAC repairs you can do without an expert, the majority of tasks are best left to experts. When your heater refuses to turn on or deliver warmth, contact Point Heating & Cooling at 715-504-0533 for experienced furnace repair in Plover.

Our technicians will swiftly determine and handle the issue, even if you don’t have a Lennox heating system. We can fix all brands or makes—and get the comfort reintroduced to your house without delay.


What Does the Flashing Light on My Heating System Mean?

Your furnace relies on lights to flash code when it requires repairs. It also works this setup to relay it’s running properly.

Correct function involves:

  • Concurrent slow flash—heater working correctly.
  • Simultaneous fast flash—furnace is starting to call for heat.

If you realize that one light blinking slowly and the other flashing rapidly, your heater might be having a low flame signal. This can happen even when your heater is operating properly. It indicates the flame sensing rod could need to be cleaned or in the wrong location on the burner. Contact us at 715-504-0533 for support.

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

Heating System Refuses to Kick On

Here are many of the light patterns you could notice when your furnace won’t turn on or keep heating. The bulk of these errors need to be handled by a technician, for instance from Point Heating & Cooling.

  1. The duo of LED lights are off. This indicates your furnace might not have power. Go to the breaker box to ensure the heater fuse has not tripped. Try resetting the fuse if it has moved into the “off” position. If it promptly turns off following a reset, don’t try to reset it again and contact us at 715-504-0533.
  2. A single light is stable and the other is flashing slowly. This means the flame rollout switch is probably not working right. The part is an important safety guard that assists in preventing fires and carbon monoxide. You shouldn’t try to repair this malfunction yourself.
  3. An individual light is flickering quickly and the other is flickering slowly. This usually indicates power polarity has been transposed. Your furnace could have a wiring error that needs specialized assistance from Point Heating & Cooling.
  4. Both lights are flickering slowly. This indicates your furnace’s blower motor probably isn’t working. This component moves heated air from the HVAC system into your space. We can help in figuring out what’s wrong with this component.
  5. A single light is blinking slowly and the other is flashing fast. This signifies your HVAC system may have low voltage or a short circuit. Reach out to our professionals at 715-504-0533 for help.
  6. One light is blinking on, on and off while the other flashes on, off, on. This signifies there might be an issue with your furnace’s control board or wiring. Point Heating & Cooling can pinpoint the error and handle it.
  7. Both lights show every other slow flashes. This indicates your heater possibly has a flame error. There might be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 715-504-0533 for help.
  8. A single light blinks slowly while the other is solid. This typically means your heating system’s limit switch is not working. The switch keeps your heating system from overheating. Reach out to the experts at Point Heating & Cooling for assistance.

Heater Blower Works But No Heat

Here’s what might be at fault when you hear your furnace’s blower fan running, but you aren’t getting any heat.

  • The pair of lights display every other rapid flashes. This indicates your furnace ignitor might not be in working order. This piece lights energy in your HVAC equipment to make warm air and should be serviced by a professional from Point Heating & Cooling.

Turn to Us for Expert Furnace Repair

When you have to get your furnace repaired fast, depend on the professionals at Point Heating & Cooling. Our techs will fix the problem right away and have your rooms feeling relaxing again in a short time. Get in touch with us at 715-504-0533 or contact us online to get an appointment now.

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