Furnace troubleshooting

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

While your Lennox® furnace can’t talk to you, it does have a procedure to tell you about a furnace error.

Its control panel has twin LED lights that can display a fault code. Depending on the problem, your heating system might display continuous or flashing lights.

While there are some elementary HVAC fixes you can complete without an expert, many tasks are best taken care of by the professionals. When your furnace won’t start or provide heat, contact Booneville Heating & Cooling LLC at 662-269-8716 for experienced furnace repair in Booneville.

Our specialists will speedily detect and take care of the problem, even if you don’t have a Lennox furnace. We can repair all types or configuration—and get the comfort reintroduced to your home quickly.


What Does the Blinking Light on My Heating System Mean?

Your heating system uses lights to flash code when it requires repairs. It also uses this system to let you know it’s running like it should.

Normal function includes:

  • Simultaneous slow flash—furnace running correctly.
  • Both lights flash fast—heater is starting to call for heat.

If you see a lone light blinking slowly and the other going on and off rapidly, your heating system may be experiencing a low flame signal. This can take place even when your heater is operating correctly. It means the flame sensing rod may have build-up or in the wrong location on the burner. Reach out to us at 662-269-8716 for help.

Here are several other of the most common errors for Lennox HVAC systems.

Heating System Won’t Start

Here are a few of the light arrangements you may notice when your furnace will not or keep running. The majority of these issues have to be fixed by a technician, for instance from Booneville Heating & Cooling LLC.

  1. Both LED lights aren’t lit. This means your HVAC system might not be receiving power. Examine the breaker box to ensure the furnace fuse hasn’t tripped. Attempt to reset the fuse if it’s in the “off” spot. If it promptly turns off after you reset it, don’t try to reset it again and get in touch with us us at 662-269-8716.
  2. An individual light is unchanging and the other is flickering slowly. This shows the flame rollout switch is probably open. The switch is an essential safety mechanism that assists in stopping fires and carbon monoxide. You shouldn’t attempt to handle this problem without professional help.
  3. One light is flashing fast and the other is blinking slowly. This likely signifies power polarity has been reversed. Your heating system may have a wiring error that needs expert aid from Booneville Heating & Cooling LLC.
  4. The pair of lights are flashing slowly. This signifies your heater’s blower motor likely isn’t operating. This component moves heated air from the heating system into your house. We can assist in pinpointing what’s causing an issue with this piece.
  5. A single light is flickering slowly and the other is flashing fast. This signifies your heater might have insufficient voltage or a short circuit. Call our experts at 662-269-8716 for help.
  6. One light is flickering on, on and off while the other blinks on, off, on. This signifies there might be an issue with your heater’s control board or wiring. Booneville Heating & Cooling LLC can find the error and fix it.
  7. The pair of lights show alternate slow flickers. This signifies your heating system possibly has a flame issue. There could be a problem with its gas supply, gas valve or ignitor control. Contact us at 662-269-8716 for support.
  8. One light flickers slowly while the other remains steady. This typically indicates your HVAC system’s limit switch is experiencing an error. The switch keeps your heating system from getting too hot. Get in touch with the pros at Booneville Heating & Cooling LLC for support.

Heating System Blower Operates But No Warmth

Here’s what may be wrong when you notice your furnace’s blower fan on, but you aren’t gaining any heat.

  • The pair of lights are showing alternating rapid flickers. This indicates your furnace ignitor may be broken. This component kindles fuel in your furnace to produce warmth and should be fixed by an expert from Booneville Heating & Cooling LLC.

Trust Us for Expert Furnace Repair

When you need to have your furnace fixed quickly, trust the technicians at Booneville Heating & Cooling LLC. Our technicians will fix the problem quickly and have your home feeling cozy again soon. Reach out to us at 662-269-8716 or contact us online to schedule an appointment right away.

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