Furnace troubleshooting

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

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

Its control panel has twin LED lights that can share a fault code. Depending on the fault, your heater could show continuous or flashing lights.

While there are some simple HVAC repairs you can finish yourself, the majority of repairs are best left to experts. When your furnace refuses to start or give heat, call Central Aire Heating & A/C Inc at 318-855-2326 for professional furnace repair in Bossier City.

Our technicians will swiftly diagnose and fix the failure, even if you don’t have a Lennox heater. We can fix whichever kinds or makes—and get the comfort reintroduced to your house quickly.


What Does the Blinking Light on My Heater Mean?

Your heating system uses lights to flash code when it is malfunctioning. It also engages this setup to relay it’s running like it should.

Normal function consists of:

  • Simultaneous slow flash—furnace operating like it should.
  • Concurrent fast flash—heater is beginning to call for heat.

If you notice one light going on and off slowly and the other flashing rapidly, your heating system may have a low flame signal. This can happen even when your heating system is working correctly. It means the flame sensing rod could have build-up or in the bad spot on the burner. Call us at 318-855-2326 for help.

Here are several other of the most typical problems for Lennox HVAC systems.

Heater Will Not Turn On

Here are a few of the light sequences you could notice when your heater refuses to or keep operating. Most of these issues must be fixed by a technician, such as one from Central Aire Heating & A/C Inc.

  1. The pair of LED lights aren’t lit. This signifies your HVAC system might not have power. Check the breaker box to make sure the heating system fuse is not triggered. You should reset the fuse if it’s in the “off” spot. If it instantly flips after a subsequent reset, don’t try to reset it again and get in touch with us us at 318-855-2326.
  2. A single light is stable and the other is flashing slowly. This means the flame rollout switch is possibly not working right. The component is a critical safety mechanism that aids in avoiding fires and carbon monoxide. You shouldn’t try to fix this malfunction without professional help.
  3. An individual light is blinking quickly and the other is flickering slowly. This often signifies power polarity has been inverted. Your heating system could have a wiring error that needs specialized aid from Central Aire Heating & A/C Inc.
  4. The pair of lights are flashing slowly. This indicates your heater’s blower motor likely isn’t working. This part distributes hot air from the HVAC system into your residence. We can help in pinpointing what’s causing an issue with this part.
  5. A single light is flickering slowly and the other is flashing fast. This indicates your heating system could have low voltage or a short circuit. Reach out to our specialists at 318-855-2326 for support.
  6. One light is blinking on, on and off while the other flickers on, off, on. This means there may be an error with your furnace’s motherboard or wiring. Central Aire Heating & A/C Inc can determine the problem and take care of it.
  7. The duo of lights display alternating slow blinks. This signifies your heating system likely has a flame problem. There might be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 318-855-2326 for support.
  8. An individual light blinks slowly while the other is continuous. This usually signifies your furnace’s limit switch is not working. The switch stops your heating system from becoming too warm. Call the experts at Central Aire Heating & A/C Inc for help.

Furnace Blower Operates But No Warmth

Here’s what might be broken when you notice your heating system’s blower fan on, but you aren’t gaining any warmth.

  • The duo of lights display alternating fast flickers. This indicates your furnace ignitor might be broken. This piece ignites energy in your heating system to create warm air and should be repaired by a technician from Central Aire Heating & A/C Inc.

Trust Us for Expert Furnace Repair

When you have to get your heater fixed without delay, turn to the technicians at Central Aire Heating & A/C Inc. Our pros will take care of the problem right away and have your residence feeling relaxing again in no time. Get in touch with us at 318-855-2326 or contact us online to request an appointment today.

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