While your Lennox® heater cannot speak to you, it does have a way to tell you about a furnace error.

Its motherboard has twin LED lights that can show a fault code. Based on the issue, your heating system might display solid or flashing lights.

Although there are a few simple HVAC adjustments you can complete on your own, many tasks are best handled by the professionals. When your furnace will not kick on or deliver warmth, call Dave's Diversified Services at 540-636-3396 for skilled furnace repair in Front Royal.

Our experts will swiftly discover and repair the problem, even if you don’t own a Lennox heating system. We can fix any types or configuration—and get the heat reintroduced to your house quickly.

What Does the Flickering Light on My Furnace Mean?

Your heating system depends on lights to flash code when it isn’t working right. It also engages this setup to relay it’s working properly.

Regular operation includes:

  • Concurrent slow flash—heating system operating properly.
  • Both lights flash fast—furnace is initiating the call for heat.

If you see a solitary light blinking slowly and the other flashing quickly, your furnace might be experiencing a low flame signal. This can happen even when your furnace is operating correctly. It signifies the flame sensing rod may need to be cleaned or in the bad location on the burner. Contact us at 540-636-3396 for support.

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

Heater Won’t Start

Here are many of the light sequences you could notice when your heat refuses to or keep operating. Most of these issues must be repaired by a technician, like one from Dave's Diversified Services.

  1. All LED lights are extinguished. This indicates your HVAC system might not be receiving power. Look at the breaker box to confirm the furnace fuse has not triggered. Attempt to reset the fuse if it is in the “off” area. If it rapidly turns off following a reset, don’t try to reset it again and contact us at 540-636-3396.
  2. A single light is unchanging and the other is blinking slowly. This shows the flame rollout switch is likely not working right. The switch is a critical safety mechanism that assists in avoiding fires and carbon monoxide. You shouldn’t attempt to take care of this fault on your own.
  3. An individual light is flickering fast and the other is flashing slowly. This likely signifies power polarity has been reversed. Your furnace might have a wiring issue that requires professional support from Dave's Diversified Services.
  4. Both lights are blinking slowly. This means your heater’s blower motor probably isn’t running. This piece distributes hot air from the HVAC system into your rooms. We can help in figuring out what’s wrong with this part.
  5. A single light is blinking slowly and the other is blinking rapidly. This means your heater could have insufficient voltage or a short circuit. Reach out to our technicians at 540-636-3396 for assistance.
  6. One light is flashing on, on, off while the other flickers on, off, on. This indicates there might be an issue with your HVAC system’s control board or wiring. Dave's Diversified Services can locate the problem and fix it.
  7. The pair of lights are using every other slow flashes. This means your HVAC equipment likely has a flame failure. There might be a problem with its gas supply, gas valve or ignitor control. Call us at 540-636-3396 for assistance.
  8. An individual light flickers slowly while the other remains continuous. This typically indicates your HVAC system’s limit switch is experiencing an error. The switch prevents your HVAC system from overheating. Reach out to the specialists at Dave's Diversified Services for assistance.

Furnace Blower Works But No Warm Air

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

  • The pair of lights are showing alternate quick flashes. This indicates your furnace ignitor may not be in working order. This component kindles fuel in your heater to make warm air and should be fixed by an expert from Dave's Diversified Services.

Trust Us for Expert Furnace Repair

When you need to get your heating system repaired fast, trust the experts at Dave's Diversified Services. Our pros will handle the issue right away and have your rooms feeling cozy again soon. Get in touch with us at 540-636-3396 or contact us online to request an appointment now.