While your Lennox® heater cannot speak to you, it has a procedure to communicate a furnace error.

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

Although there are some basic HVAC adjustments you can complete without an expert, many tasks are best left to HVAC technicians. When your furnace refuses to turn on or put out warm air, reach out to Fire & Ice HVAC at 703-595-4157 for skilled furnace repair in Manassas.

Our technicians will quickly detect and repair the breakdown, even if you don’t own a Lennox heating system. We can service any brands or models—and get the heat reintroduced to your house quickly.

What Does the Flashing Light on My Heater Mean?

Your furnace relies on lights to flash code when it is malfunctioning. It also works these lights to relay it’s operating like it should.

Regular operation consists of:

  • Concurrent slow flash—heater heating like it should.
  • Simultaneous fast flash—furnace is beginning to call for heat.

If you see a lone light blinking slowly and the other flashing quickly, your heating system might be having a low flame signal. This can occur even when your heating system is heating correctly. It means the flame sensing rod could be dirty or in the wrong area on the burner. Call us at 703-595-4157 for support.

Here are some of the most typical issues for Lennox heaters.

Furnace Will Not Turn On

Here are some of the light sequences you might see when your heater will not or keep operating. The majority of these issues must be fixed by a technician, like one from Fire & Ice HVAC.

  1. The pair of LED lights aren’t lit. This means your heater might not have power. Go to the breaker box to make sure the heater fuse hasn’t flipped. You should reset the fuse if it is in the “off” position. If it instantly flips after you reset it, don’t try to reset it again and get in touch with us us at 703-595-4157.
  2. A single light is stable and the other is flickering slowly. This shows the flame rollout switch is likely malfunctioning. The switch is an essential safety mechanism that helps in avoiding fires and carbon monoxide. You shouldn’t try to fix this issue without professional help.
  3. A single light is flashing fast and the other is flashing slowly. This often signifies power polarity has been transposed. Your furnace may have a wiring problem that needs specialized assistance from Fire & Ice HVAC.
  4. The duo of lights are flashing slowly. This signifies your furnace’s blower motor likely isn’t working. This piece sends heated air from the HVAC system into your house. We can aid in pinpointing what’s causing a problem with this part.
  5. An individual light is flickering slowly and the other is blinking quickly. This means your heating system might have insufficient voltage or a short circuit. Reach out to our specialists at 703-595-4157 for support.
  6. One light is flickering on, on, off while the other flickers on, off, on. This means there may be trouble with your HVAC system’s control panel or wiring. Fire & Ice HVAC can pinpoint the error and fix it.
  7. The pair of lights are using every other slow blinks. This signifies your heater possibly has a flame error. There may be an issue with its gas supply, gas valve or ignitor control. Reach out to us at 703-595-4157 for help.
  8. A single light flickers slowly while the other is steady. This typically means your heater’s limit switch is not working. The switch stops your heater from overheating. Call the experts at Fire & Ice HVAC for support.

Heater Blower Works But No Warm Air

Here’s what might be broken when you notice your heating equipment’s blower fan working, but you aren’t gaining any warm air.

  • The duo of lights are showing every other rapid flickers. This means your furnace ignitor may not be working. This piece kindles fuel in your HVAC equipment to produce warm air and should be repaired by a specialist from Fire & Ice HVAC.

Depend on Us for Professional Furnace Repair

When you have to get your HVAC equipment repaired quickly, trust the professionals at Fire & Ice HVAC. Our technicians will fix the error without delay and have your house feeling relaxing again soon. Reach out to us at 703-595-4157 or contact us online to schedule an appointment right away.