Furnace troubleshooting

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

While your Lennox® heating system cannot talk to you, it possesses a procedure to communicate a furnace error.

Its control panel has twin LED lights that can display a fault code. Depending on the malfunction, your furnace might use steady or flashing lights.

Although there are various basic furnace adjustments you can complete yourself, the majority of tasks are best handled by experts. When your heating system refuses to turn on or deliver heat, contact Davis Heating & Air Conditioning at 540-369-3790 for experienced furnace repair in Rocky Mount.

Our specialists will rapidly pinpoint and handle the problem, even if you don’t own a Lennox furnace. We can service any kinds or makes—and get the comfort reintroduced to your house quickly.


What Does the Flashing Light on My Furnace Mean?

Your heater relies on lights to flash code when it requires repairs. It also works these lights to relay it’s heating properly.

Normal operation consists of:

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

If you see a lone light blinking slowly and the other blinking rapidly, your heater could be experiencing a low flame signal. This can take place even when your heater is operating correctly. It indicates the flame sensing rod could be dirty or in the wrong area on the burner. Contact us at 540-369-3790 for assistance.

Here are several other of the most common problems for Lennox HVAC systems.

Heating System Refuses to Start

Here are many of the light patterns you may observe when your furnace will not or keep operating. The majority of these issues have to be handled by a specialist, like one from Davis Heating & Air Conditioning.

  1. The duo of LED lights are extinguished. This indicates your heating system might not have power. Find the breaker box to make sure the heater fuse hasn’t flipped. You should reset the fuse if it has moved into the “off” position. If it immediately turns off following a reset, don’t try to reset it again and contact us at 540-369-3790.
  2. A single light is solid and the other is flickering slowly. This signifies the flame rollout switch is likely malfunctioning. The part is an important safety guard that aids in avoiding fires and carbon monoxide. You shouldn’t attempt to take care of this malfunction without professional help.
  3. One light is blinking fast and the other is flickering slowly. This often signifies power polarity has been transposed. Your heater might have a wiring problem that needs specialized support from Davis Heating & Air Conditioning.
  4. Both lights are flickering slowly. This signifies your heating system’s blower motor possibly isn’t working. This component moves warm air from the furnace into your space. We can assist in figuring out what’s causing an issue with this piece.
  5. A single light is flashing slowly and the other is flashing quickly. This signifies your heating system could have insufficient voltage or a short circuit. Reach out to our professionals at 540-369-3790 for help.
  6. One light is flashing on, on and off while the other blinks on, off, on. This indicates there may be a malfunction with your heating system’s control panel or wiring. Davis Heating & Air Conditioning can locate the problem and handle it.
  7. The pair of lights are using alternate slow blinks. This means your furnace may have a flame failure. There might be an issue with its gas supply, gas valve or ignitor control. Reach out to us at 540-369-3790 for assistance.
  8. A single light flashes slowly while the other stays solid. This usually means your heating system’s limit switch is open. The switch stops your furnace from becoming too warm. Get in touch with the specialists at Davis Heating & Air Conditioning for help.

Furnace Blower Operates But No Warmth

Here’s what might be at fault when you hear your heating equipment’s blower fan running, but you aren’t gaining any heat.

  • Both lights are giving alternate quick flickers. This means your furnace ignitor could not be in working order. This piece kindles fuel in your heater to make warmth and should be serviced by an expert from Davis Heating & Air Conditioning.

Depend on Us for Skilled Furnace Repair

When you have to have your heater repaired fast, depend on the professionals at Davis Heating & Air Conditioning. Our pros will repair the issue without delay and have your home feeling relaxing again soon. Contact us at 540-369-3790 or contact us online to get an appointment today.

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