Furnace troubleshooting

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

While your Lennox® heating system cannot talk to you, it has a method to communicate a furnace error.

Its control panel has twin LED lights that can display a fault code. Subject to the failure, your heater could display continuous or flashing lights.

While there are certain simple HVAC fixes you can take care of on your own, many fixes are best left to experts. When your furnace won’t turn on or provide heated air, contact Vogts Heating & Air at 208-621-0129 for experienced furnace repair in Pocatello.

Our technicians will speedily determine and handle the failure, even if you don’t use a Lennox heating system. We can service any brands or makes—and get the warmth reintroduced to your residence fast.


What Does the Flashing Light on My Heater Mean?

Your heating system uses lights to flash code when it needs to be repaired. It also engages this setup to relay it’s working properly.

Correct function consists of:

  • Both lights flash slowly—furnace heating correctly.
  • Both lights flash fast—furnace is initiating the call for heat.

If you notice a solitary light going on and off slowly and the other flashing quickly, your heater may have a low flame signal. This can occur even when your heater is heating like it should. It signifies the flame sensing rod could be dirty or in the wrong spot on the burner. Reach out to us at 208-621-0129 for support.

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

Furnace Won’t Kick On

Here are many of the light patterns you might see when your heater won’t turn on or stay on. The majority of these errors have to be repaired by a technician, such as one from Vogts Heating & Air.

  1. The duo of LED lights aren’t lit. This indicates your HVAC system might not have electricity. Go to the breaker box to make sure the furnace fuse has not flipped. Try resetting the fuse if it’s in the “off” position. If it rapidly flips after a subsequent reset, leave the breaker alone and contact us at 208-621-0129.
  2. A single light is stable and the other is flickering slowly. This shows the flame rollout switch is likely malfunctioning. The part is an essential safety tool that assists in avoiding fires and carbon monoxide. You shouldn’t attempt to handle this fault yourself.
  3. One light is blinking rapidly and the other is flashing slowly. This usually signifies power polarity has been transposed. Your furnace may have a wiring problem that calls for professional support from Vogts Heating & Air.
  4. The pair of lights are flashing slowly. This indicates your furnace’s blower motor probably isn’t working. This piece circulates hot air from the HVAC system into your rooms. We can assist in figuring out what’s causing a problem with this component.
  5. One light is blinking slowly and the other is blinking fast. This indicates your furnace may have not enough voltage or a short circuit. Get in touch with our experts at 208-621-0129 for help.
  6. One light is flashing on, on and off while the other blinks on, off, on. This indicates there could be an error with your heater’s control panel or wiring. Vogts Heating & Air can pinpoint the problem and repair it.
  7. The pair of lights show alternate slow blinks. This signifies your HVAC equipment likely has a flame failure. There could be an issue with its gas supply, gas valve or ignitor control. Call us at 208-621-0129 for support.
  8. An individual light flickers slowly while the other is steady. This usually means your heating system’s limit switch is not working. The switch stops your furnace from getting too hot. Call the pros at Vogts Heating & Air for support.

Furnace Blower Runs But No Heat

Here’s what could be broken when you hear your heating equipment’s blower fan on, but you aren’t receiving any warmth.

  • The duo of lights are giving alternate fast flickers. This means your furnace ignitor might not be working. This part lights gas in your HVAC equipment to produce heat and should be fixed by a specialist from Vogts Heating & Air.

Trust Us for Expert Furnace Repair

When you need to get your HVAC equipment fixed fast, turn to the specialists at Vogts Heating & Air. Our technicians will take care of the issue promptly and have your residence feeling relaxing again soon. Call us at 208-621-0129 or contact us online to get an appointment today.

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