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

December 06, 2019

While your Lennox® HVAC equipment cannot speak to you, it does have a process to communicate a furnace error.

Its control board has twin LED lights that can share a fault code. Depending on the fault, your heating system might display steady or flashing lights.

Though there are a few elementary heating adjustments you can finish yourself, many tasks are best taken care of by experts. When your furnace won’t turn on or deliver heated air, call Total Comfort at 201-268-5663 for professional furnace repair in Franklin Lakes.

Our specialists will speedily determine and handle the breakdown, even if you don’t use a Lennox furnace. We can service all kinds or makes—and get the heat reintroduced to your house quickly.


What Does the Flickering Light on My Heating System Mean?

Your heater depends on lights to flash code when it requires repairs. It also uses this system to relay it’s working properly.

Correct function involves:

  • Both lights flash slowly—heater heating like it should.
  • Simultaneous fast flash—heater is initiating the call for heat.

If you realize that a solitary light going on and off slowly and the other blinking fast, your heating system could be having a low flame signal. This can take place even when your heating system is working properly. It indicates the flame sensing rod could be dirty or in the wrong location on the burner. Call us at 201-268-5663 for help.

Here are some of the most routine errors for Lennox heating systems.

Heater Refuses to Start

Here are many of the light arrangements you might see when your heating system refuses to or keep operating. The majority of these issues must be handled by a specialist, such as one from Total Comfort.

  1. All LED lights aren’t lit. This signifies your heater might not be receiving power. Find the breaker box to ensure the heater fuse is not tripped. Attempt to reset the fuse if it is in the “off” position. If it rapidly turns off following a reset, don’t try to reset it again and get in touch with us us at 201-268-5663.
  2. An individual light is solid and the other is flickering slowly. This means the flame rollout switch is likely open. The part is an important safety device that assists in preventing fires and carbon monoxide. You shouldn’t try to handle this fault on your own.
  3. An individual light is flashing quickly and the other is blinking slowly. This often indicates power polarity has been inverted. Your furnace might have a wiring issue that needs specialized support from Total Comfort.
  4. The pair of lights are blinking slowly. This means your heating system’s blower motor probably isn’t operating. This piece distributes heated air from the heater into your rooms. We can help in determining what’s causing an issue with this piece.
  5. An individual light is flickering slowly and the other is blinking fast. This means your heater may have insufficient voltage or a short circuit. Get in touch with our experts at 201-268-5663 for help.
  6. One light is blinking on, on and off while the other flickers on, off, on. This means there might be a malfunction with your heater’s control board or wiring. Total Comfort can pinpoint the fault and take care of it.
  7. The pair of lights are using alternate slow flashes. This means your furnace possibly has a flame problem. There may be an issue with its gas supply, gas valve or ignitor control. Contact us at 201-268-5663 for support.
  8. One light flickers slowly while the other remains steady. This typically indicates your HVAC system’s limit switch is malfunctioning. The switch stops your heating system from getting too hot. Call the pros at Total Comfort for assistance.

Furnace Blower Works But No Warmth

Here’s what might be at fault when you observe your heater’s blower fan working, but you aren’t receiving any warmth.

  • The pair of lights are giving every other quick flickers. This indicates your furnace ignitor might be broken. This part lights fuel in your furnace to make warmth and should be fixed by an expert from Total Comfort.

Trust Us for Professional Furnace Repair

When you have to have your HVAC equipment in working order fast, trust the professionals at Total Comfort. Our pros will handle the error without delay and have your space feeling relaxing again in no time. Call us at 201-268-5663 or contact us online to get an appointment now.