Furnace troubleshooting

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

While your Lennox® HVAC equipment can’t talk to you, it has a way to communicate a furnace error.

Its motherboard has two LED lights that can display a fault code. Based on the malfunction, your heating system could use continuous or flashing lights.

Although there are various basic heating adjustments you can take care of yourself, the majority of tasks are best handled by experts. When your heating system refuses to kick on or provide warm air, get in touch with Gee & Missler Heating & Air Conditioning at 734-363-8907 for skilled furnace repair in Wyandotte.

Our specialists will quickly discover and fix the malfunction, even if you don’t own a Lennox heater. We can service all brands or models—and get the warmth returned to your residence without delay.


What Does the Flickering Light on My Heater Mean?

Your heater depends on lights to flash code when it isn’t working right. It also engages this setup to let you know it’s running like it should.

Regular function consists of:

  • Concurrent slow flash—heating system running correctly.
  • Both lights flash fast—heater is initiating the call for heat.

If you realize that a solitary light flashing slowly and the other blinking fast, your heating system could be experiencing a low flame signal. This can occur even when your heater is working like it should. It means the flame sensing rod could be dirty or in the bad spot on the burner. Reach out to us at 734-363-8907 for support.

Here are several other of the most common issues for Lennox furnaces.

Heating System Won’t Start

Here are many of the light sequences you could notice when your heating system refuses to or keep heating. The bulk of these issues have to be fixed by a specialist, like one from Gee & Missler Heating & Air Conditioning.

  1. The pair of LED lights aren’t lit. This means your heater might not have power. Look at the breaker box to ensure the heating system fuse is not tripped. Try resetting the fuse if it’s in the “off” spot. If it promptly flips after a subsequent reset, don’t touch the breaker and call us at 734-363-8907.
  2. One light is solid and the other is flashing slowly. This implies the flame rollout switch is probably not working right. The part is an important safety guard that helps in stopping fires and carbon monoxide. You shouldn’t attempt to take care of this issue on your own.
  3. An individual light is flashing rapidly and the other is flashing slowly. This often signifies power polarity has been reversed. Your heater could have a wiring error that requires expert help from Gee & Missler Heating & Air Conditioning.
  4. Both lights are flickering slowly. This indicates your furnace’s blower motor likely isn’t working. This piece distributes warm air from the heating system into your house. We can help in pinpointing what’s causing a problem with this piece.
  5. One light is flickering slowly and the other is flickering quickly. This means your furnace could have not enough voltage or a short circuit. Reach out to our specialists at 734-363-8907 for help.
  6. One light is flashing on, on and off while the other flashes on, off, on. This indicates there may be a problem with your furnace’s control board or wiring. Gee & Missler Heating & Air Conditioning can locate the problem and handle it.
  7. The duo of lights show alternating slow blinks. This means your heating system may have a flame error. There could be an issue with its gas supply, gas valve or ignitor control. Reach out to us at 734-363-8907 for support.
  8. A single light flashes slowly while the other stays steady. This often means your heater’s limit switch is malfunctioning. The switch keeps your heating system from overheating. Reach out to the professionals at Gee & Missler 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 working, but you aren’t getting any heat.

  • The pair of lights display alternating quick flashes. This means your furnace ignitor might not be in working order. This component lights fuel in your furnace to produce warm air and should be serviced by an expert from Gee & Missler Heating & Air Conditioning.

Depend on Us for Skilled Furnace Repair

When you have to get your furnace in working order quickly, depend on the professionals at Gee & Missler Heating & Air Conditioning. Our technicians will repair the issue right away and have your house feeling comfortable again in no time. Reach out to us at 734-363-8907 or contact us online to request an appointment today.

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