Furnace troubleshooting

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

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

Its control panel has two LED lights that can show a fault code. Depending on the fault, your heater may show continuous or flashing lights.

Although there are a few simple furnace repairs you can do without an expert, the majority of tasks are best taken care of by the professionals. When your heating system won’t kick on or put out warm air, get in touch with Durable Service at 308-995-8177 for professional furnace repair in Holdrege.

Our technicians will swiftly detect and take care of the issue, even if you don’t use a Lennox furnace. We can repair all types or makes—and get the warmth returned to your house quickly.


What Does the Blinking Light on My Heater Mean?

Your heater depends on lights to flash code when it requires repairs. It also works this system to relay it’s running like it should.

Correct heating includes:

  • Simultaneous slow flash—furnace operating properly.
  • Both lights flash fast—heating system is beginning to call for heat.

If you notice one light flashing slowly and the other blinking rapidly, your furnace could be having a low flame signal. This can happen even when your heating system is running properly. It indicates the flame sensing rod may have build-up or in the bad area on the burner. Call us at 308-995-8177 for support.

Here are a few other of the most typical faults for Lennox furnaces.

Heater Will Not Kick On

Here are a few of the light arrangements you may see when your heat refuses to or keep running. The bulk of these issues have to be fixed by a specialist, such as one from Durable Service .

  1. The duo of LED lights aren’t lit. This means your heater might not be receiving power. Go to the breaker box to confirm the furnace fuse is not triggered. You should reset the fuse if it has moved into the “off” area. If it promptly turns off after you reset it, leave the breaker alone and contact us at 308-995-8177.
  2. An individual light is solid and the other is blinking slowly. This shows the flame rollout switch is probably open. The part is a critical safety tool that helps in preventing fires and carbon monoxide. You shouldn’t attempt to fix this fault on your own.
  3. An individual light is flickering rapidly and the other is blinking slowly. This often signifies power polarity has been inverted. Your heater might have a wiring error that requires professional assistance from Durable Service .
  4. The duo of lights are blinking slowly. This signifies your heating system’s blower motor possibly isn’t running. This piece sends heated air from the HVAC system into your house. We can assist in pinpointing what’s wrong with this piece.
  5. A single light is blinking slowly and the other is flashing rapidly. This indicates your HVAC system may have not enough voltage or a short circuit. Contact our specialists at 308-995-8177 for support.
  6. One light is blinking on, on and off while the other blinks on, off, on. This means there could be an issue with your furnace’s control panel or wiring. Durable Service can locate the problem and handle it.
  7. The pair of lights are using alternating slow flickers. This indicates your heater likely has a flame issue. There may be a problem with its gas supply, gas valve or ignitor control. Call us at 308-995-8177 for help.
  8. A single light blinks slowly while the other is solid. This typically means your HVAC system’s limit switch is experiencing an error. The switch keeps your HVAC system from overheating. Reach out to the specialists at Durable Service for assistance.

Heater Blower Works But No Warm Air

Here’s what might be broken when you observe your heating equipment’s blower fan on, but you aren’t receiving any warm air.

  • Both lights are giving alternate quick blinks. This means your furnace ignitor may be broken. This piece ignites fuel in your heating system to create heat and should be serviced by a professional from Durable Service .

Turn to Us for Skilled Furnace Repair

When you have to have your HVAC equipment fixed quickly, depend on the experts at Durable Service . Our techs will fix the issue promptly and have your home feeling cozy again soon. Reach out to us at 308-995-8177 or contact us online to schedule an appointment right away.

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