Furnace troubleshooting

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

While your Lennox® heater cannot talk to you, it does have a procedure to communicate a furnace error.

Its control panel has double LED lights that can display a fault code. Subject to the issue, your heating system may show continuous or flashing lights.

While there are certain simple HVAC adjustments you can do yourself, the majority of services are best left to experts. When your heater won’t turn on or provide warm air, reach out to E.B. Air, LLC at 979-335-4262 for professional furnace repair in East Bernard.

Our experts will swiftly discover and repair the malfunction, even if you don’t use a Lennox heater. We can fix whichever kinds or models—and get the heat reintroduced to your house quickly.


What Does the Flickering Light on My Heating System Mean?

Your heater uses lights to flash code when it is malfunctioning. It also engages this setup to relay it’s working properly.

Regular function includes:

  • Both lights flash slowly—heating system working properly.
  • Concurrent fast flash—heater is initiating the call for heat.

If you notice one light flashing slowly and the other going on and off rapidly, your furnace could be having a low flame signal. This can take place even when your heating system is working like it should. It signifies the flame sensing rod could need to be cleaned or in the wrong area on the burner. Reach out to us at 979-335-4262 for assistance.

Here are a few other of the most common faults for Lennox furnaces.

Furnace Will Not Turn On

Here are many of the light patterns you might notice when your heat will not or keep heating. Most of these errors need to be fixed by a technician, for instance from E.B. Air, LLC.

  1. All LED lights are extinguished. This indicates your furnace might not have electricity. Look at the breaker box to make sure the heater fuse hasn’t tripped. Attempt to reset the fuse if it’s in the “off” spot. If it instantly flips following a reset, don’t touch the breaker and get in touch with us us at 979-335-4262.
  2. An individual light is continuous and the other is blinking slowly. This shows the flame rollout switch is may be open. The switch is a critical safety guard that aids in preventing fires and carbon monoxide. You shouldn’t seek to handle this problem without professional help.
  3. An individual light is flashing quickly and the other is flickering slowly. This often signifies power polarity has been inverted. Your heater could have a wiring error that calls for expert aid from E.B. Air, LLC.
  4. Both lights are blinking slowly. This means your heating system’s blower motor probably isn’t running. This part moves warm air from the furnace into your space. We can help in pinpointing what’s causing a problem with this component.
  5. An individual light is blinking slowly and the other is flickering fast. This indicates your HVAC system might have not enough voltage or a short circuit. Reach out to our experts at 979-335-4262 for support.
  6. One light is flashing on, on and off while the other blinks on, off, on. This indicates there might be a problem with your furnace’s control panel or wiring. E.B. Air, LLC can find the problem and handle it.
  7. The duo of lights display alternating slow flashes. This indicates your heater possibly has a flame issue. There could be an issue with its gas supply, gas valve or ignitor control. Reach out to us at 979-335-4262 for help.
  8. A single light flashes slowly while the other stays continuous. This typically signifies your heater’s limit switch is malfunctioning. The switch prevents your HVAC system from overheating. Get in touch with the specialists at E.B. Air, LLC for support.

Heater Blower Runs But No Warm Air

Here’s what may be wrong when you hear your heater’s blower fan on, but you aren’t gaining any heated air.

  • The pair of lights display every other fast flashes. This indicates your furnace ignitor could not be in working order. This piece ignites fuel in your heating system to make heat and should be serviced by an expert from E.B. Air, LLC.

Depend on Us for Professional Furnace Repair

When you need to have your furnace fixed without delay, depend on the technicians at E.B. Air, LLC. Our pros will fix the error right away and have your residence feeling comfortable again in a short time. Contact us at 979-335-4262 or contact us online to get an appointment today.

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