Furnace troubleshooting

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

While your Lennox® heating system can’t speak to you, it has a process to tell you about a furnace error.

Its control board has twin LED lights that can show a fault code. Subject to the fault, your heater might display continuous or flashing lights.

While there are some elementary HVAC fixes you can finish without an expert, the majority of fixes are best handled by experts. When your furnace will not kick on or give heat, contact Faust Air Conditioning and Heating at 979-323-6130 for expert furnace repair in Wharton.

Our technicians will swiftly pinpoint and repair the fault, even if you don’t have a Lennox heater. We can fix whichever brands or models—and get the heat returned to your house without delay.


What Does the Flickering Light on My Heater Mean?

Your heater uses lights to flash code when it isn’t working right. It also engages these lights to tell you it’s running like it should.

Normal heating consists of:

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

If you notice a single light flashing slowly and the other blinking rapidly, your heating system could have a low flame signal. This can happen even when your heater is heating like it should. It means the flame sensing rod might have build-up or in the incorrect spot on the burner. Call us at 979-323-6130 for support.

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

Heater Refuses to Start

Here are many of the light arrangements you may observe when your heat won’t turn on or keep running. The majority of these issues have to be handled by an expert, such as one from Faust Air Conditioning and Heating.

  1. The pair of LED lights are off. This means your HVAC system might not have power. Check the breaker box to ensure the heater fuse hasn’t flipped. Try resetting the fuse if it is in the “off” area. If it rapidly turns off following a reset, leave the breaker alone and get in touch with us us at 979-323-6130.
  2. An individual light is unchanging and the other is blinking slowly. This signifies the flame rollout switch is may be open. The switch is an essential safety tool that assists in avoiding fires and carbon monoxide. You shouldn’t try to take care of this fault yourself.
  3. An individual light is blinking quickly and the other is flickering slowly. This usually means power polarity has been reversed. Your furnace may have a wiring issue that needs expert aid from Faust Air Conditioning and Heating.
  4. The pair of lights are blinking slowly. This indicates your heating system’s blower motor possibly isn’t operating. This piece distributes heated air from the HVAC system into your space. We can help in figuring out what’s wrong with this piece.
  5. One light is flickering slowly and the other is flashing rapidly. This indicates your heater might have insufficient voltage or a short circuit. Call our professionals at 979-323-6130 for support.
  6. One light is flickering on, on and off while the other flashes on, off, on. This indicates there might be a fault with your heater’s motherboard or wiring. Faust Air Conditioning and Heating can determine the error and handle it.
  7. The pair of lights are using every other slow blinks. This means your furnace possibly has a flame error. There may be trouble with its gas supply, gas valve or ignitor control. Contact us at 979-323-6130 for help.
  8. A single light flickers slowly while the other remains solid. This typically means your furnace’s limit switch is experiencing an error. The switch stops your furnace from becoming too warm. Contact the experts at Faust Air Conditioning and Heating for help.

Heating System Blower Works But No Warmth

Here’s what could be broken when you notice your furnace’s blower fan on, but you aren’t getting any warm air.

  • The pair of lights are giving alternating rapid blinks. This means your furnace ignitor could not be working. This part lights energy in your heating system to create heat and should be fixed by a specialist from Faust Air Conditioning and Heating.

Depend on Us for Expert Furnace Repair

When you need to have your furnace fixed quickly, turn to the technicians at Faust Air Conditioning and Heating. Our pros will fix the error right away and have your home feeling cozy again in no time. Call us at 979-323-6130 or contact us online to get an appointment right away.

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