Furnace troubleshooting

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

While your Lennox® HVAC equipment isn’t able to chat with you, it does have a method to communicate a furnace error.

Its motherboard has two LED lights that can share a fault code. Subject to the malfunction, your heater could show continuous or flashing lights.

Though there are certain simple HVAC adjustments you can take care of yourself, the majority of services are best taken care of by experts. When your furnace refuses to start or deliver heat, contact Colvin's Heating and Cooling at 816-379-3918 for expert furnace repair in Excelsior Springs.

Our experts will swiftly detect and fix the problem, even if you don’t use a Lennox heater. We can service any types or makes—and get the warmth returned to your residence without delay.


What Does the Flashing Light on My Furnace Mean?

Your heater uses lights to flash code when it isn’t working right. It also uses this system to let you know it’s running correctly.

Normal heating includes:

  • Both lights flash slowly—furnace operating properly.
  • Concurrent fast flash—furnace is initiating the call for heat.

If you realize that a lone light blinking slowly and the other blinking fast, your heater may be experiencing a low flame signal. This can take place even when your furnace is heating correctly. It signifies the flame sensing rod might need to be cleaned or in the incorrect area on the burner. Call us at 816-379-3918 for assistance.

Here are several other of the most typical faults for Lennox heating systems.

Heating System Refuses to Start

Here are a few of the light arrangements you could see when your heater will not or keep operating. The bulk of these problems must be handled by a specialist, for instance from Colvin's Heating and Cooling.

  1. The pair of LED lights are extinguished. This means your heater might not be receiving power. Go to the breaker box to make sure the furnace fuse isn’t tripped. Try resetting the fuse if it has moved into the “off” position. If it immediately turns off after a subsequent reset, don’t touch the breaker and call us at 816-379-3918.
  2. A single light is solid and the other is blinking slowly. This means the flame rollout switch is may be not working right. The switch is an important safety mechanism that aids in preventing fires and carbon monoxide. You shouldn’t try to handle this fault without professional help.
  3. An individual light is flashing rapidly and the other is flickering slowly. This likely means power polarity has been reversed. Your heating system could have a wiring error that calls for professional help from Colvin's Heating and Cooling.
  4. All lights are flashing slowly. This signifies your heater’s blower motor possibly isn’t operating. This part moves hot air from the heater into your rooms. We can help in pinpointing what’s causing an issue with this part.
  5. An individual light is flickering slowly and the other is flashing quickly. This signifies your heater may have not enough voltage or a short circuit. Call our specialists at 816-379-3918 for support.
  6. One light is blinking on, on and off while the other flashes on, off, on. This indicates there could be a fault with your heater’s control board or wiring. Colvin's Heating and Cooling can determine the issue and handle it.
  7. Both lights are using alternate slow blinks. This means your heating system may have a flame failure. There may be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 816-379-3918 for support.
  8. A single light blinks slowly while the other stays solid. This often means your furnace’s limit switch is not working. The switch prevents your HVAC equipment from becoming too warm. Get in touch with the experts at Colvin's Heating and Cooling for support.

Furnace Blower Operates But No Warmth

Here’s what may be at fault when you hear your heating equipment’s blower fan running, but you aren’t receiving any heat.

  • Both lights are showing alternating rapid blinks. This means your furnace ignitor could not be working. This component ignites fuel in your heating system to make warmth and should be fixed by an expert from Colvin's Heating and Cooling.

Depend on Us for Skilled Furnace Repair

When you need to get your heater repaired fast, turn to the technicians at Colvin's Heating and Cooling. Our pros will take care of the issue quickly and have your residence feeling comfortable again in no time. Reach out to us at 816-379-3918 or contact us online to schedule an appointment now.

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