Furnace troubleshooting

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

While your Lennox® HVAC equipment can’t talk to you, it does have a procedure to communicate a furnace error.

Its control panel has a set of LED lights that can display a fault code. Based on the issue, your heating system may display continuous or flashing lights.

While there are certain elementary HVAC fixes you can do on your own, the majority of services are best handled by the professionals. When your heating system refuses to turn on or give heated air, get in touch with J.L. Brady Company LLC at 309-517-7511 for skilled furnace repair in Moline.

Our specialists will swiftly diagnose and repair the issue, even if you don’t have a Lennox heating system. We can service all kinds or models—and get the warmth restored to your house without delay.


What Does the Flashing Light on My Heater Mean?

Your heating system depends on lights to flash code when it needs to be repaired. It also works these lights to tell you it’s running like it should.

Correct operation involves:

  • Both lights flash slowly—heater operating like it should.
  • Simultaneous fast flash—heating system is initiating the call for heat.

If you realize that a solitary light going on and off slowly and the other going on and off fast, your heating system might be having a low flame signal. This can take place even when your furnace is working correctly. It signifies the flame sensing rod may be dirty or in the wrong area on the burner. Contact us at 309-517-7511 for assistance.

Here are some of the most routine faults for Lennox heaters.

Heating System Refuses to Turn On

Here are many of the light sequences you could see when your furnace won’t turn on or keep operating. The bulk of these problems need to be repaired by a technician, for instance from J.L. Brady Company LLC.

  1. All LED lights aren’t lit. This signifies your HVAC system might not have electricity. Find the breaker box to confirm the furnace fuse is not triggered. You should reset the fuse if it’s in the “off” spot. If it immediately turns off following a reset, don’t touch the breaker and call us at 309-517-7511.
  2. A single light is continuous and the other is flashing slowly. This shows the flame rollout switch is possibly malfunctioning. The part is a critical safety tool that helps in stopping fires and carbon monoxide. You shouldn’t attempt to repair this issue without professional help.
  3. A single light is blinking quickly and the other is blinking slowly. This typically means power polarity has been inverted. Your heater could have a wiring issue that calls for specialized support from J.L. Brady Company LLC.
  4. The pair of lights are flashing slowly. This signifies your furnace’s blower motor probably isn’t working. This part moves hot air from the heater into your rooms. We can aid in figuring out what’s causing an issue with this part.
  5. A single light is blinking slowly and the other is blinking quickly. This means your furnace could have not enough voltage or a short circuit. Get in touch with our technicians at 309-517-7511 for support.
  6. One light is flashing on, on and off while the other flickers on, off, on. This means there could be a problem with your HVAC system’s control panel or wiring. J.L. Brady Company LLC can locate the problem and handle it.
  7. The pair of lights display every other slow flickers. This signifies your HVAC equipment may have a flame failure. There might be a problem with its gas supply, gas valve or ignitor control. Reach out to us at 309-517-7511 for assistance.
  8. An individual light blinks slowly while the other is steady. This often signifies your heater’s limit switch is experiencing an error. The switch stops your heating system from getting too hot. Reach out to the specialists at J.L. Brady Company LLC for support.

Heating System Blower Runs But No Warmth

Here’s what may be broken when you notice your furnace’s blower fan running, but you aren’t getting any warm air.

  • The duo of lights are showing every other fast flickers. This signifies your furnace ignitor could not be working. This piece ignites energy in your HVAC equipment to produce warm air and should be fixed by an expert from J.L. Brady Company LLC.

Turn to Us for Expert Furnace Repair

When you have to have your heating system in working order without delay, trust the technicians at J.L. Brady Company LLC. Our techs will repair the issue quickly and have your house feeling relaxing again in no time. Call us at 309-517-7511 or contact us online to schedule an appointment today.

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