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 get your attention when there’s a furnace error.

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

Although there are certain basic heating adjustments you can take care of yourself, the majority of services are best taken care of by experts. When your furnace will not 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 own a Lennox heater. We can service any kinds or models—and get the warmth reintroduced to your residence without delay.


What Does the Flickering Light on My Furnace Mean?

Your heating system uses lights to flash code when it isn’t working right. It also engages this system to let you know it’s running like it should.

Normal heating includes:

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

If you notice a lone light going on and off slowly and the other going on and off rapidly, your heater may have 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 wrong location on the burner. Call us at 816-379-3918 for assistance.

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

Heating System Will Not Start

Here are many of the light arrangements you might see when your heat refuses to or keep operating. Most of these issues must be fixed by a specialist, for instance from Colvin's Heating and Cooling.

  1. The pair of LED lights are extinguished. This signifies your heater might not have electricity. Go to the breaker box to make sure the furnace fuse hasn’t tripped. Attempt to reset the fuse if it has moved into the “off” position. If it immediately turns off after a subsequent reset, don’t try to reset it again and call us at 816-379-3918.
  2. A single light is unchanging and the other is flickering slowly. This shows the flame rollout switch is may be malfunctioning. The switch is an important safety mechanism that assists in preventing fires and carbon monoxide. You shouldn’t try to handle this fault without professional help.
  3. An individual light is flashing fast and the other is blinking slowly. This likely means power polarity has been reversed. Your heating system might have a wiring fault that calls for professional help from Colvin's Heating and Cooling.
  4. All lights are flashing slowly. This indicates your heater’s blower motor possibly isn’t operating. This part circulates 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 indicates your heater may have insufficient 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 might be a fault with your heater’s control board or wiring. Colvin's Heating and Cooling can determine the fault and handle it.
  7. Both lights display alternate slow blinks. This means your heater may have a flame failure. There might be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 816-379-3918 for assistance.
  8. An individual light blinks slowly while the other stays steady. This often means your heating system’s limit switch is not working. The switch prevents your HVAC equipment from becoming too warm. Contact the professionals at Colvin's Heating and Cooling for help.

Furnace Blower Works But No Warm Air

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

  • Both lights are giving alternating quick flickers. This means your furnace ignitor might be broken. This piece ignites fuel in your heating system to make warmth and should be fixed by an expert from Colvin's Heating and Cooling.

Turn to Us for Skilled Furnace Repair

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

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