Furnace troubleshooting

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

While your Lennox® furnace can’t speak to you, it possesses a procedure to tell you about a furnace error.

Its motherboard has two LED lights that can show a fault code. Depending on the fault, your heating system might show continuous or flashing lights.

Although there are a few elementary HVAC fixes you can do yourself, the majority of fixes are best handled by HVAC technicians. When your heater will not start or provide warm air, call Quality Refrigeration Services at 410-690-4244 for experienced furnace repair in Baltimore.

Our specialists will rapidly determine and handle the malfunction, even if you don’t use a Lennox heating system. We can service whichever kinds or makes—and get the warmth restored to your home fast.


What Does the Flickering Light on My Heater Mean?

Your furnace depends on lights to flash code when it needs to be repaired. It also engages this system to relay it’s heating correctly.

Regular function involves:

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

If you notice a single light blinking slowly and the other going on and off rapidly, your furnace might be experiencing a low flame signal. This can happen even when your heating system is heating like it should. It indicates the flame sensing rod could need to be cleaned or in the bad spot on the burner. Contact us at 410-690-4244 for help.

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

Heater Will Not Kick On

Here are some of the light sequences you might observe when your heater will not or keep operating. The majority of these issues need to be taken care of by a specialist, such as one from Quality Refrigeration Services.

  1. Both LED lights are off. This means your heating system might not have electricity. Find the breaker box to make sure the heater fuse is not flipped. Attempt to reset the fuse if it is in the “off” position. If it immediately trips after you reset it, leave the breaker alone and get in touch with us us at 410-690-4244.
  2. A single light is stable and the other is blinking slowly. This means the flame rollout switch is likely malfunctioning. The part is an important safety tool that assists in stopping fires and carbon monoxide. You shouldn’t try to fix this issue on your own.
  3. An individual light is blinking quickly and the other is flickering slowly. This usually means power polarity has been transposed. Your heater may have a wiring error that calls for professional aid from Quality Refrigeration Services.
  4. The duo of lights are blinking slowly. This signifies your furnace’s blower motor likely isn’t running. This piece distributes heated air from the furnace into your space. We can assist in determining what’s causing a problem with this piece.
  5. One light is flashing slowly and the other is flickering fast. This indicates your heater may have insufficient voltage or a short circuit. Reach out to our technicians at 410-690-4244 for assistance.
  6. One light is blinking on, on and off while the other flickers on, off, on. This indicates there could be an issue with your HVAC system’s control board or wiring. Quality Refrigeration Services can determine the fault and repair it.
  7. Both lights show every other slow flickers. This means your heater possibly has a flame error. There may be an issue with its gas supply, gas valve or ignitor control. Call us at 410-690-4244 for help.
  8. A single light blinks slowly while the other is steady. This often indicates your heater’s limit switch is open. The switch stops your HVAC system from becoming too warm. Call the pros at Quality Refrigeration Services for help.

Heater Blower Operates But No Heat

Here’s what could be wrong when you notice your heater’s blower fan running, but you aren’t gaining any warmth.

  • Both lights display every other fast flashes. This means your furnace ignitor might not be working. This piece ignites gas in your furnace to make warm air and should be fixed by an expert from Quality Refrigeration Services.

Trust Us for Professional Furnace Repair

When you need to get your heating system repaired fast, trust the technicians at Quality Refrigeration Services. Our pros will fix the fault quickly and have your rooms feeling relaxing again in no time. Reach out to us at 410-690-4244 or contact us online to request an appointment now.

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