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

December 06, 2019

While your Lennox® heater cannot chat with you, it does have a procedure to get your attention when there’s a furnace error.

Its control panel has a set of LED lights that can display a fault code. Subject to the fault, your heating system could use continuous or flashing lights.

While there are a few basic HVAC fixes you can do yourself, the majority of services are best handled by experts. When your furnace will not start or give heat, get in touch with Airmen HVAC Service at 570-322-3131 for experienced furnace repair in Montoursville.

Our experts will rapidly identify and handle the failure, even if you don’t use a Lennox heating system. We can service whichever kinds or configuration—and get the warmth restored to your home fast.


What Does the Blinking Light on My Heating System Mean?

Your furnace relies on lights to flash code when it requires repairs. It also uses these lights to tell you it’s working like it should.

Correct heating involves:

  • Simultaneous slow flash—furnace heating correctly.
  • Concurrent fast flash—heating system is starting to call for heat.

If you realize that a solitary light going on and off slowly and the other flashing rapidly, your heating system may be experiencing a low flame signal. This can happen even when your heater is working like it should. It indicates the flame sensing rod may be dirty or in the wrong location on the burner. Contact us at 570-322-3131 for assistance.

Here are some of the most common errors for Lennox HVAC systems.

Furnace Refuses to Start

Here are many of the light patterns you may observe when your heat won’t turn on or keep operating. The majority of these problems need to be fixed by a specialist, like one from Airmen HVAC Service.

  1. The duo of LED lights are extinguished. This signifies your heating system might not have electricity. Find the breaker box to make sure the heater fuse hasn’t tripped. Try resetting the fuse if it’s in the “off” position. If it instantly turns off following a reset, don’t try to reset it again and get in touch with us us at 570-322-3131.
  2. An individual light is stable and the other is blinking slowly. This signifies the flame rollout switch is may be not working right. The part is a critical safety tool that assists in avoiding fires and carbon monoxide. You shouldn’t attempt to repair this malfunction on your own.
  3. An individual light is flickering rapidly and the other is blinking slowly. This typically means power polarity has been inverted. Your furnace might have a wiring error that requires expert support from Airmen HVAC Service.
  4. The pair of lights are flickering slowly. This signifies your heating system’s blower motor possibly isn’t operating. This part circulates heated air from the HVAC system into your house. We can assist in determining what’s causing a problem with this part.
  5. One light is flickering slowly and the other is flashing rapidly. This indicates your furnace may have insufficient voltage or a short circuit. Get in touch with our experts at 570-322-3131 for help.
  6. One light is flashing on, on and off while the other flickers on, off, on. This means there could be an issue with your furnace’s control board or wiring. Airmen HVAC Service can find the error and handle it.
  7. The duo of lights display alternate slow flickers. This means your heater may have a flame error. There may be a problem with its gas supply, gas valve or ignitor control. Contact us at 570-322-3131 for assistance.
  8. An individual light flickers slowly while the other stays solid. This usually signifies your heating system’s limit switch is open. The switch keeps your heater from getting too hot. Get in touch with the experts at Airmen HVAC Service for help.

Furnace Blower Runs But No Heat

Here’s what could be broken when you observe your heating system’s blower fan working, but you aren’t gaining any warmth.

  • Both lights are giving alternate fast flashes. This indicates your furnace ignitor could be broken. This component ignites fuel in your heating system to make warm air and should be repaired by a professional from Airmen HVAC Service.

Trust Us for Skilled Furnace Repair

When you need to have your furnace in working order fast, depend on the specialists at Airmen HVAC Service. Our pros will take care of the problem without delay and have your house feeling comfortable again in a short time. Get in touch with us at 570-322-3131 or contact us online to schedule an appointment now.