Furnace troubleshooting

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

While your Lennox® heater can’t chat with you, it has a way to tell you about a furnace error.

Its control panel has a set of LED lights that can show a fault code. Based on the fault, your heater could use solid or flashing lights.

While there are various simple heating adjustments you can finish on your own, most tasks are best taken care of by experts. When your furnace will not turn on or give heat, reach out to Climate Control Systems at 828-283-0369 for professional furnace repair in Hickory.

Our technicians will quickly discover and fix the failure, even if you don’t use a Lennox furnace. We can repair any kinds or configuration—and get the warmth reintroduced to your house fast.


What Does the Flickering Light on My Furnace Mean?

Your heating system uses lights to flash code when it is malfunctioning. It also engages this system to let you know it’s heating like it should.

Correct heating includes:

  • Simultaneous slow flash—heating system operating properly.
  • Concurrent fast flash—heater is beginning to call for heat.

If you see one light flashing slowly and the other blinking fast, your furnace might be having a low flame signal. This can occur even when your furnace is running correctly. It signifies the flame sensing rod may be dirty or in the wrong area on the burner. Call us at 828-283-0369 for assistance.

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

Heater Won’t Start

Here are some of the light arrangements you could notice when your furnace won’t turn on or keep running. The bulk of these errors need to be taken care of by an expert, like one from Climate Control Systems.

  1. The pair of LED lights are extinguished. This signifies your heater might not be receiving power. Check the breaker box to confirm the furnace fuse is not tripped. Try resetting the fuse if it has moved into the “off” position. If it rapidly flips after a subsequent reset, don’t touch the breaker and get in touch with us us at 828-283-0369.
  2. An individual light is solid and the other is flickering slowly. This means the flame rollout switch is probably malfunctioning. The switch is an essential safety tool that assists in preventing fires and carbon monoxide. You shouldn’t try to take care of this issue yourself.
  3. An individual light is flickering quickly and the other is flickering slowly. This likely signifies power polarity has been reversed. Your heater may have a wiring issue that calls for specialized assistance from Climate Control Systems.
  4. Both lights are flashing slowly. This indicates your heater’s blower motor likely isn’t operating. This component sends hot air from the heater into your space. We can help in figuring out what’s causing an issue with this component.
  5. One light is flickering slowly and the other is flashing fast. This signifies your furnace might have not enough voltage or a short circuit. Reach out to our professionals at 828-283-0369 for support.
  6. One light is flickering on, on and off while the other blinks on, off, on. This means there might be trouble with your heating system’s control board or wiring. Climate Control Systems can find the fault and fix it.
  7. Both lights display every other slow flashes. This signifies your HVAC system likely has a flame problem. There might be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 828-283-0369 for support.
  8. One light flashes slowly while the other stays solid. This typically indicates your heating system’s limit switch is experiencing an error. The switch keeps your HVAC system from getting too hot. Reach out to the specialists at Climate Control Systems for assistance.

Furnace Blower Operates But No Heat

Here’s what might be broken when you hear your furnace’s blower fan on, but you aren’t getting any heat.

  • Both lights display alternating quick blinks. This indicates your furnace ignitor might not be working. This component ignites fuel in your HVAC equipment to create heat and should be serviced by a specialist from Climate Control Systems.

Depend on Us for Expert Furnace Repair

When you have to have your heating system repaired quickly, turn to the experts at Climate Control Systems. Our techs will handle the error without delay and have your house feeling relaxing again soon. Contact us at 828-283-0369 or contact us online to get an appointment now.

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