Furnace troubleshooting

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

While your Lennox® furnace cannot speak to you, it possesses a method to tell you about a furnace error.

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

Though there are various elementary heating fixes you can finish on your own, most repairs are best taken care of by experts. When your furnace refuses to start or deliver warmth, get in touch with Redhawk Heating & Air Conditioning at 432-237-0168 for skilled furnace repair in Odessa.

Our specialists will speedily determine and repair the problem, even if you don’t own a Lennox heating system. We can repair any brands or models—and get the comfort reintroduced to your residence without delay.


What Does the Flashing Light on My Heating System Mean?

Your furnace uses lights to flash code when it requires repairs. It also engages these lights to let you know it’s heating like it should.

Regular heating includes:

  • Simultaneous slow flash—heating system working like it should.
  • Simultaneous fast flash—heating system is beginning to call for heat.

If you notice a single light flashing slowly and the other blinking rapidly, your furnace may be having a low flame signal. This can happen even when your heating system is working properly. It means the flame sensing rod could be dirty or in the incorrect spot on the burner. Contact us at 432-237-0168 for support.

Here are several other of the most routine errors for Lennox heaters.

Heating System Refuses to Start

Here are some of the light arrangements you could notice when your furnace won’t turn on or keep operating. The majority of these errors must be handled by a professional, for instance from Redhawk Heating & Air Conditioning.

  1. The pair of LED lights are extinguished. This means your furnace might not have power. Find the breaker box to make sure the furnace fuse hasn’t triggered. Attempt to reset the fuse if it is in the “off” spot. If it rapidly trips following a reset, don’t touch the breaker and contact us at 432-237-0168.
  2. A single light is unchanging and the other is flickering slowly. This signifies the flame rollout switch is may be open. The switch is an important safety guard that aids in preventing fires and carbon monoxide. You shouldn’t attempt to fix this fault on your own.
  3. One light is flashing fast and the other is blinking slowly. This typically means power polarity has been reversed. Your furnace may have a wiring error that needs specialized aid from Redhawk Heating & Air Conditioning.
  4. Both lights are blinking slowly. This means your heating system’s blower motor probably isn’t working. This part sends hot air from the heating system into your house. We can assist in pinpointing what’s causing a problem with this part.
  5. A single light is flashing slowly and the other is flickering fast. This indicates your furnace might have low voltage or a short circuit. Call our technicians at 432-237-0168 for help.
  6. One light is flashing on, on and off while the other flickers on, off, on. This indicates there could be a malfunction with your heating system’s motherboard or wiring. Redhawk Heating & Air Conditioning can locate the fault and repair it.
  7. Both lights display alternate slow flashes. This signifies your HVAC system likely has a flame issue. There may be trouble with its gas supply, gas valve or ignitor control. Call us at 432-237-0168 for support.
  8. An individual light flashes slowly while the other stays continuous. This often indicates your furnace’s limit switch is experiencing an error. The switch prevents your heating system from getting too hot. Get in touch with the pros at Redhawk Heating & Air Conditioning for assistance.

Heater Blower Runs But No Warm Air

Here’s what might be at fault when you hear your heater’s blower fan on, but you aren’t receiving any heat.

  • The duo of lights are giving alternating fast flashes. This means your furnace ignitor might be broken. This piece lights fuel in your heating system to create heat and should be fixed by a professional from Redhawk Heating & Air Conditioning.

Depend on Us for Skilled Furnace Repair

When you have to have your heating system repaired fast, turn to the technicians at Redhawk Heating & Air Conditioning. Our techs will take care of the problem without delay and have your residence feeling comfortable again in a short time. Reach out to us at 432-237-0168 or contact us online to get an appointment today.

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