Furnace troubleshooting

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

While your Lennox® furnace can’t chat with you, it has a method to communicate a furnace error.

Its motherboard has twin LED lights that can display a fault code. Based on the fault, your heater may show continuous or flashing lights.

Although there are certain elementary heating repairs you can complete yourself, the majority of fixes are best taken care of by HVAC technicians. When your heater refuses to start or give warmth, call Lycoming Heating Company at 570-244-2510 for expert furnace repair in Williamsport.

Our experts will speedily determine and repair the failure, even if you don’t use a Lennox furnace. We can fix any types or configuration—and get the heat restored to your residence without delay.


What Does the Flashing Light on My Heating System Mean?

Your furnace depends on lights to flash code when it isn’t working right. It also works this setup to let you know it’s operating properly.

Normal heating consists of:

  • Simultaneous slow flash—furnace working properly.
  • 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 flashing fast, your heater may be experiencing a low flame signal. This can occur even when your furnace is operating properly. It means the flame sensing rod may be dirty or in the bad spot on the burner. Contact us at 570-244-2510 for support.

Here are several other of the most routine faults for Lennox furnaces.

Heater Will Not Kick On

Here are some of the light sequences you might notice when your heater won’t turn on or keep heating. The bulk of these issues must be taken care of by a professional, like one from Lycoming Heating Company.

  1. The duo of LED lights are off. This signifies your HVAC system might not have power. Find the breaker box to make sure the heater fuse hasn’t flipped. Attempt to reset the fuse if it has moved into the “off” position. If it rapidly trips after a subsequent reset, don’t touch the breaker and get in touch with us us at 570-244-2510.
  2. A single light is stable and the other is flickering slowly. This shows the flame rollout switch is may be not working right. The switch is a critical safety device that assists in preventing fires and carbon monoxide. You shouldn’t try to take care of this problem on your own.
  3. A single light is flickering rapidly and the other is flickering slowly. This likely signifies power polarity has been reversed. Your furnace could have a wiring issue that requires professional assistance from Lycoming Heating Company.
  4. The pair of lights are flickering slowly. This signifies your furnace’s blower motor probably isn’t operating. This piece distributes heated air from the heater into your home. We can assist in determining what’s causing a problem with this part.
  5. One light is flashing slowly and the other is flashing fast. This indicates your heater may have insufficient voltage or a short circuit. Reach out to our technicians at 570-244-2510 for support.
  6. One light is blinking on, on and off while the other flashes on, off, on. This means there may be a problem with your furnace’s control panel or wiring. Lycoming Heating Company can determine the problem and handle it.
  7. The duo of lights display alternating slow flashes. This means your furnace possibly has a flame failure. There might be an issue with its gas supply, gas valve or ignitor control. Call us at 570-244-2510 for support.
  8. One light flickers slowly while the other stays solid. This usually means your HVAC equipment’s limit switch is experiencing an error. The switch stops your heater from becoming too warm. Reach out to the experts at Lycoming Heating Company for help.

Furnace Blower Runs But No Warmth

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

  • The duo of lights display alternating fast blinks. This indicates your furnace ignitor could not be in working order. This piece kindles gas in your heating system to make warmth and should be serviced by a specialist from Lycoming Heating Company.

Trust Us for Skilled Furnace Repair

When you need to get your furnace repaired fast, turn to the experts at Lycoming Heating Company. Our technicians will take care of the problem right away and have your space feeling relaxing again in no time. Contact us at 570-244-2510 or contact us online to get an appointment today.

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