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

Its motherboard has two LED lights that can share a fault code. Depending on the problem, your furnace might use steady or flashing lights.

While there are some simple furnace repairs you can complete yourself, most services are best taken care of by HVAC technicians. When your heating system won’t kick on or provide heated air, reach out to LTS Plumbing & Heating Inc. at 570-648-0748 for professional furnace repair in Shamokin and Sunbury.

Our technicians will speedily identify and repair the malfunction, even if you don’t have a Lennox heating system. We can repair whichever brands or makes—and get the comfort returned to your home fast.

What Does the Blinking Light on My Heating System Mean?

Your heater relies on lights to flash code when it isn’t working right. It also uses this setup to tell you it’s operating properly.

Normal heating consists of:

  • Simultaneous slow flash—heating system working correctly.
  • Simultaneous fast flash—heating system is starting to call for heat.

If you see a solitary light going on and off slowly and the other flashing fast, your heating system might be experiencing a low flame signal. This can occur even when your heater is heating properly. It means the flame sensing rod might need to be cleaned or in the bad area on the burner. Contact us at 570-648-0748 for help.

Here are some of the most routine issues for Lennox HVAC systems.

Furnace Refuses to Kick On

Here are a few of the light patterns you may notice when your furnace will not or keep running. The bulk of these errors need to be repaired by a professional, for instance from LTS Plumbing & Heating Inc..

  1. Both LED lights are extinguished. This signifies your HVAC system might not have power. Look at the breaker box to make sure the heating system fuse is not tripped. Try resetting the fuse if it is in the “off” area. If it promptly trips after you reset it, don’t touch the breaker and contact us at 570-648-0748.
  2. One light is stable and the other is flashing slowly. This shows the flame rollout switch is may be malfunctioning. The component is a critical safety guard that assists in avoiding fires and carbon monoxide. You shouldn’t attempt to fix this fault without professional help.
  3. An individual light is blinking fast and the other is flashing slowly. This likely signifies power polarity has been transposed. Your furnace might have a wiring fault that calls for specialized assistance from LTS Plumbing & Heating Inc..
  4. Both lights are blinking slowly. This indicates your heater’s blower motor likely isn’t running. This part circulates hot air from the HVAC system into your residence. We can help in figuring out what’s causing a problem with this component.
  5. An individual light is flashing slowly and the other is flickering fast. This means your heating system may have low voltage or a short circuit. Contact our specialists at 570-648-0748 for assistance.
  6. One light is flashing on, on, off while the other blinks on, off, on. This means there could be a malfunction with your heating system’s motherboard or wiring. LTS Plumbing & Heating Inc. can determine the issue and repair it.
  7. The duo of lights are using alternating slow flickers. This signifies your HVAC system likely has a flame failure. There may be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 570-648-0748 for assistance.
  8. A single light blinks slowly while the other stays steady. This typically indicates your HVAC equipment’s limit switch is experiencing an error. The switch prevents your HVAC system from overheating. Reach out to the professionals at LTS Plumbing & Heating Inc. for help.

Furnace Blower Runs But No Warm Air

Here’s what could be at fault when you observe your heater’s blower fan running, but you aren’t getting any heated air.

  • The pair of lights display every other rapid flashes. This means your furnace ignitor may be broken. This part ignites gas in your heating system to produce warmth and should be fixed by an expert from LTS Plumbing & Heating Inc..

Turn to Us for Expert Furnace Repair

When you have to get your HVAC equipment in working order quickly, turn to the technicians at LTS Plumbing & Heating Inc.. Our pros will repair the error without delay and have your residence feeling comfortable again in no time. Contact us at 570-648-0748 or contact us online to schedule an appointment right away.