While your Lennox® HVAC equipment cannot speak to you, it has a way to communicate a furnace error.

Its motherboard has double LED lights that can show a fault code. Depending on the issue, your furnace could display solid or flashing lights.

Although there are a few elementary HVAC fixes you can finish without an expert, many services are best handled by the professionals. When your heater refuses to start or put out warmth, reach out to B & G HVAC at 641-316-3360 for skilled furnace repair in Marshalltown.

Our experts will rapidly detect and fix the problem, even if you don’t own a Lennox heater. We can repair all types or configuration—and get the heat reintroduced to your residence quickly.

What Does the Blinking Light on My Furnace Mean?

Your heating system uses lights to flash code when it isn’t working right. It also works this setup to tell you it’s heating correctly.

Regular operation includes:

  • Simultaneous slow flash—heating system heating like it should.
  • Simultaneous fast flash—furnace is initiating the call for heat.

If you realize that a single light flashing slowly and the other flashing fast, your heater might be experiencing a low flame signal. This can take place even when your heater is running correctly. It indicates the flame sensing rod could have buildup or in the wrong spot on the burner. Call us at 641-316-3360 for help.

Here are some of the most routine problems for Lennox furnaces.

Heater Refuses to Kick On

Here are a few of the light patterns you could observe when your heating system refuses to or keep running. The bulk of these issues must be fixed by a professional, like one from B & G HVAC.

  1. Both LED lights are off. This signifies your heating system might not have electricity. Look at the breaker box to ensure the heating system fuse isn’t flipped. Attempt to reset the fuse if it’s in the “off” area. If it immediately trips after a subsequent reset, don’t try to reset it again and get in touch with us us at 641-316-3360.
  2. One light is stable and the other is flashing slowly. This implies the flame rollout switch is may be not working right. The component is an essential safety device that assists in avoiding fires and carbon monoxide. You shouldn’t attempt to repair this fault on your own.
  3. A single light is flashing quickly and the other is blinking slowly. This often indicates power polarity has been inverted. Your heating system could have a wiring problem that needs specialized aid from B & G HVAC.
  4. All lights are blinking slowly. This signifies your heater’s blower motor possibly isn’t running. This piece sends hot air from the HVAC system into your space. We can aid in pinpointing what’s wrong with this piece.
  5. One light is flashing slowly and the other is flashing fast. This signifies your heater might have insufficient voltage or a short circuit. Call our technicians at 641-316-3360 for assistance.
  6. One light is flashing on, on, off while the other flashes on, off, on. This means there may be trouble with your heating system’s control panel or wiring. B & G HVAC can find the error and repair it.
  7. The duo of lights are using alternating slow flashes. This indicates your heating system may have a flame error. There might be a problem with its gas supply, gas valve or ignitor control. Call us at 641-316-3360 for help.
  8. A single light flickers slowly while the other stays continuous. This often means your HVAC equipment’s limit switch is experiencing an error. The switch keeps your HVAC system from becoming too warm. Reach out to the professionals at B & G HVAC for help.

Heating System Blower Works But No Warmth

Here’s what might be broken when you observe your heating equipment’s blower fan working, but you aren’t getting any warmth.

  • Both lights are showing alternate rapid blinks. This means your furnace ignitor could be broken. This part lights fuel in your heating system to create warm air and should be serviced by an expert from B & G HVAC.

Depend on Us for Expert Furnace Repair

When you need to have your heating system fixed fast, trust the technicians at B & G HVAC. Our technicians will handle the fault right away and have your rooms feeling comfortable again in no time. Contact us at 641-316-3360 or contact us online to request an appointment right away.