Furnace troubleshooting

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

While your Lennox® heater isn’t able to talk to you, it does have a procedure to tell you about a furnace error.

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

While there are some elementary furnace adjustments you can complete yourself, the majority of services are best taken care of by the professionals. When your heater refuses to start or give warm air, reach out to Four Seasons Air Conditioning and Heating LLC at 361-214-1203 for expert furnace repair in Kingsville.

Our experts will quickly detect and repair the failure, even if you don’t have a Lennox furnace. We can repair whichever types or models—and get the comfort returned to your house without delay.


What Does the Flashing Light on My Heater Mean?

Your furnace uses lights to flash code when it is malfunctioning. It also uses this system to relay it’s operating properly.

Normal function consists of:

  • Both lights flash slowly—heating system heating like it should.
  • Both lights flash fast—heating system is starting to call for heat.

If you see a solitary light flashing slowly and the other flashing rapidly, your heating system could have a low flame signal. This can happen even when your heater is working properly. It means the flame sensing rod may need to be cleaned or in the incorrect location on the burner. Contact us at 361-214-1203 for help.

Here are a few other of the most routine faults for Lennox heating systems.

Heater Will Not Start

Here are many of the light arrangements you may notice when your furnace will not or keep heating. The majority of these errors need to be handled by a professional, such as one from Four Seasons Air Conditioning and Heating LLC.

  1. Both LED lights are off. This means your HVAC system might not have power. Check the breaker box to make sure the furnace fuse hasn’t tripped. Attempt to reset the fuse if it’s in the “off” area. If it promptly flips after a subsequent reset, don’t touch the breaker and get in touch with us us at 361-214-1203.
  2. An individual light is continuous and the other is flashing slowly. This means the flame rollout switch is probably malfunctioning. The switch is a critical safety mechanism that aids in avoiding fires and carbon monoxide. You shouldn’t try to repair this fault on your own.
  3. An individual light is flashing rapidly and the other is flashing slowly. This usually means power polarity has been transposed. Your heater could have a wiring problem that needs expert support from Four Seasons Air Conditioning and Heating LLC.
  4. The pair of lights are flashing slowly. This means your heater’s blower motor probably isn’t working. This part moves heated air from the HVAC system into your home. We can help in figuring out what’s causing an issue with this part.
  5. An individual light is flashing slowly and the other is flashing rapidly. This signifies your HVAC system could have not enough voltage or a short circuit. Contact our professionals at 361-214-1203 for support.
  6. One light is flickering on, on and off while the other blinks on, off, on. This signifies there could be a fault with your heating system’s control board or wiring. Four Seasons Air Conditioning and Heating LLC can pinpoint the issue and handle it.
  7. The duo of lights are using every other slow flashes. This signifies your heating system possibly has a flame failure. There could be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 361-214-1203 for assistance.
  8. A single light flashes slowly while the other stays continuous. This typically indicates your HVAC equipment’s limit switch is malfunctioning. The switch stops your HVAC system from getting too hot. Contact the experts at Four Seasons Air Conditioning and Heating LLC for assistance.

Furnace Blower Works But No Heat

Here’s what might be wrong when you hear your furnace’s blower fan working, but you aren’t receiving any heat.

  • Both lights display alternate fast flickers. This means your furnace ignitor may be broken. This part kindles fuel in your heater to make warm air and should be repaired by a professional from Four Seasons Air Conditioning and Heating LLC.

Depend on Us for Professional Furnace Repair

When you need to have your HVAC equipment fixed without delay, depend on the experts at Four Seasons Air Conditioning and Heating LLC. Our techs will take care of the error quickly and have your space feeling cozy again in no time. Call us at 361-214-1203 or contact us online to get an appointment right away.

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