Furnace troubleshooting

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

While your Lennox® furnace can’t chat with you, it has a method to get your attention when there’s a furnace error.

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

Although there are certain basic furnace adjustments you can take care of without an expert, many fixes are best handled by HVAC technicians. When your heating system won’t start or put out warmth, contact Premium Air Services LLC at 713-364-9957 for expert furnace repair in Tomball.

Our experts will speedily spot and fix the fault, even if you don’t have a Lennox furnace. We can fix whichever kinds or models—and get the warmth restored to your residence quickly.


What Does the Blinking Light on My Heater Mean?

Your furnace relies on lights to flash code when it is malfunctioning. It also engages this system to let you know it’s working correctly.

Correct heating includes:

  • Both lights flash slowly—heater working like it should.
  • Simultaneous fast flash—heating system is initiating the call for heat.

If you realize that a solitary light flashing slowly and the other going on and off quickly, your furnace might be experiencing a low flame signal. This can occur even when your heating system is heating like it should. It signifies the flame sensing rod might have build-up or in the bad area on the burner. Reach out to us at 713-364-9957 for assistance.

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

Heating System Will Not Turn On

Here are many of the light patterns you may observe when your heating system won’t turn on or keep operating. The majority of these problems have to be fixed by a professional, for instance from Premium Air Services LLC.

  1. The duo of LED lights are extinguished. This means your furnace might not be receiving power. Look at the breaker box to make sure the heating system fuse hasn’t flipped. 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 means 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 take care of this fault yourself.
  3. A single light is flashing rapidly and the other is flickering slowly. This often indicates power polarity has been inverted. Your furnace could have a wiring issue that requires specialized support from Premium Air Services LLC.
  4. All lights are flickering slowly. This indicates your heater’s blower motor likely isn’t working. This part sends hot air from the furnace into your house. We can help in determining what’s causing an issue with this component.
  5. A single light is blinking slowly and the other is blinking rapidly. This means your furnace might have low voltage or a short circuit. Reach out to our experts at 713-364-9957 for assistance.
  6. One light is flashing on, on and off while the other flickers on, off, on. This means there might be a fault with your heating system’s control panel or wiring. Premium Air Services LLC can pinpoint the fault and handle it.
  7. The pair of lights show alternating slow blinks. This means your HVAC system may have a flame error. There could be trouble with its gas supply, gas valve or ignitor control. Contact us at 713-364-9957 for help.
  8. A single light blinks slowly while the other is solid. This usually indicates your HVAC equipment’s limit switch is malfunctioning. The switch prevents your HVAC equipment from becoming too warm. Call the professionals at Premium Air Services LLC for help.

Heater Blower Works But No Warm Air

Here’s what may be at fault when you observe your heating system’s blower fan on, but you aren’t receiving any warm air.

  • Both lights are showing alternating rapid flickers. This indicates your furnace ignitor could not be in working order. This part ignites gas in your heater to make heat and should be fixed by an expert from Premium Air Services LLC.

Trust Us for Skilled Furnace Repair

When you have to get your heater in working order without delay, depend on the professionals at Premium Air Services LLC. Our techs will fix the issue promptly and have your residence feeling cozy again soon. Call us at 713-364-9957 or contact us online to request an appointment right away.

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