While your Lennox® heater can’t talk to you, it does have a way to communicate a furnace error.

Its motherboard has two LED lights that can share a fault code. Based on the issue, your heating system could show solid or flashing lights.

Although there are certain simple heating fixes you can complete without an expert, the majority of repairs are best left to the professionals. When your furnace will not kick on or deliver heated air, reach out to Scott Temperature at 785-269-0465 for professional furnace repair in Lawrence.

Our specialists will rapidly determine and repair the issue, even if you don’t use a Lennox heater. We can service all types or makes—and get the comfort returned to your house fast.

What Does the Flashing Light on My Furnace Mean?

Your heater uses lights to flash code when it is malfunctioning. It also works this system to let you know it’s heating properly.

Regular operation includes:

  • Simultaneous slow flash—furnace operating like it should.
  • Simultaneous fast flash—heating system is starting to call for heat.

If you realize that a lone light going on and off slowly and the other blinking quickly, your heater might be having a low flame signal. This can occur even when your furnace is operating like it should. It means the flame sensing rod could be dirty or in the wrong spot on the burner. Reach out to us at 785-269-0465 for help.

Here are some of the most common errors for Lennox heating systems.

Heater Won’t Kick On

Here are some of the light patterns you might see when your furnace refuses to or keep heating. The bulk of these issues must be handled by a specialist, such as one from Scott Temperature.

  1. Both LED lights are extinguished. This means your heating system might not have power. Examine the breaker box to make sure the heater fuse isn’t flipped. Try resetting the fuse if it is in the “off” area. If it rapidly flips after a subsequent reset, don’t try to reset it again and get in touch with us us at 785-269-0465.
  2. A single light is unchanging and the other is blinking slowly. This implies the flame rollout switch is likely open. The part is an essential safety guard that helps in stopping fires and carbon monoxide. You shouldn’t seek to take care of this issue on your own.
  3. An individual light is flickering quickly and the other is flickering slowly. This likely indicates power polarity has been reversed. Your furnace might have a wiring problem that calls for specialized help from Scott Temperature.
  4. The duo of lights are flashing slowly. This indicates your heater’s blower motor probably isn’t running. This part distributes warm air from the heater into your house. We can aid in figuring out what’s causing a problem with this piece.
  5. One light is blinking slowly and the other is blinking quickly. This signifies your HVAC system might have not enough voltage or a short circuit. Get in touch with our technicians at 785-269-0465 for help.
  6. One light is flashing on, on, off while the other flashes on, off, on. This means there may be a fault with your heater’s motherboard or wiring. Scott Temperature can locate the problem and fix it.
  7. The pair of lights show alternating slow flickers. This signifies your heating system may have a flame problem. There may be a problem with its gas supply, gas valve or ignitor control. Get in touch with us at 785-269-0465 for assistance.
  8. An individual light blinks slowly while the other remains steady. This typically means your HVAC system’s limit switch is malfunctioning. The switch keeps your HVAC equipment from becoming too warm. Call the professionals at Scott Temperature for support.

Heater Blower Runs But No Heat

Here’s what could be broken when you observe your heating equipment’s blower fan on, but you aren’t receiving any warmth.

  • Both lights are showing alternate fast blinks. This means your furnace ignitor may not be working. This component kindles gas in your HVAC equipment to create warm air and should be fixed by an expert from Scott Temperature.

Trust Us for Expert Furnace Repair

When you have to get your HVAC equipment fixed quickly, turn to the professionals at Scott Temperature. Our techs will take care of the fault quickly and have your rooms feeling comfortable again in a short time. Contact us at 785-269-0465 or contact us online to request an appointment right away.