Furnace troubleshooting

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

While your Lennox® furnace can’t speak to you, it has a method to communicate a furnace error.

Its control board has two LED lights that can display a fault code. Based on the issue, your heating system may display steady or flashing lights.

Although there are certain basic furnace fixes you can take care of on your own, many fixes are best left to experts. When your heating system won’t start or put out warmth, contact Premium Air Services LLC at 713-364-9957 for experienced furnace repair in Tomball.

Our specialists will quickly determine and fix the fault, even if you don’t have a Lennox furnace. We can fix all types or models—and get the comfort restored to your residence quickly.

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What Does the Blinking Light on My Heating System Mean?

Your furnace relies on lights to flash code when it needs to be repaired. It also engages this system to let you know it’s working like it should.

Regular heating involves:

  • Both lights flash slowly—heater operating like it should.
  • Both lights flash fast—furnace is initiating the call for heat.

If you realize that one light flashing slowly and the other blinking quickly, your furnace could have a low flame signal. This can take place even when your heater is heating properly. It indicates the flame sensing rod might have build-up or in the bad area on the burner. Contact us at 713-364-9957 for help.

Here are several other of the most routine problems for Lennox heating systems.

Heating System Will Not Turn On

Here are a few of the light sequences you may observe when your heating system won’t turn on or keep operating. The majority of these issues have to be handled by an expert, for instance from Premium Air Services LLC.

  1. The duo of LED lights aren’t lit. This signifies your furnace might not have electricity. Examine the breaker box to make sure the heater fuse isn’t triggered. Try resetting the fuse if it has moved into the “off” area. If it rapidly trips after you reset it, leave the breaker alone and contact us at 713-364-9957.
  2. One light is stable and the other is flashing slowly. This shows the flame rollout switch is may be not working right. The switch is an important safety device that helps in preventing fires and carbon monoxide. You shouldn’t try to fix this fault yourself.
  3. A single light is flashing rapidly and the other is blinking slowly. This often signifies power polarity has been inverted. Your furnace could have a wiring issue that requires specialized help from Premium Air Services LLC.
  4. All lights are blinking slowly. This signifies your heater’s blower motor likely isn’t working. This part sends heated air from the heater into your house. We can help in determining what’s causing a problem with this piece.
  5. A single light is blinking slowly and the other is blinking rapidly. This means your furnace could have low voltage or a short circuit. Call our experts at 713-364-9957 for assistance.
  6. One light is flashing on, on and off while the other blinks on, off, on. This means there might be a fault with your heating system’s control panel or wiring. Premium Air Services LLC can find the fault and handle it.
  7. The duo of lights show alternating slow flickers. This means your HVAC system may have a flame error. There could be an issue with its gas supply, gas valve or ignitor control. Contact us at 713-364-9957 for help.
  8. An individual light blinks slowly while the other is solid. This usually indicates your HVAC equipment’s limit switch is open. The switch prevents your HVAC equipment from becoming too warm. Call the experts at Premium Air Services LLC for support.

Heater Blower Operates But No Warm Air

Here’s what might be at fault when you observe your heating system’s blower fan working, but you aren’t getting any heat.

  • Both lights are giving alternating quick blinks. This signifies your furnace ignitor could not be in working order. This part ignites gas in your heater to make heat and should be repaired by an expert from Premium Air Services LLC.

Trust Us for Skilled Furnace Repair

When you have to get your heater repaired fast, depend on the specialists at Premium Air Services LLC. Our pros will take care of the issue without delay and have your residence feeling relaxing again soon. Call us at 713-364-9957 or contact us online to request an appointment now.

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