Furnace troubleshooting

Top Lennox® Furnace Error Codes (and What They Mean)

While your Lennox® furnace isn’t able to speak to you, it does have a procedure to tell you about a furnace error.

Its motherboard has twin LED lights that can share a fault code. Depending on the issue, your furnace might use steady or flashing lights.

While there are various basic furnace repairs you can take care of without an expert, most tasks are best taken care of by the professionals. When your heating system won’t kick on or put out warm air, get in touch with Schagrin Gas Company at 302-231-1380 for professional furnace repair in Middletown.

Our technicians will quickly discover and take care of the problem, even if you don’t own a Lennox heater. We can repair all types or makes—and get the warmth restored to your home fast.


What Does the Flashing Light on My Heater Mean?

Your furnace relies on lights to flash code when it needs to be repaired. It also works this setup to relay it’s heating correctly.

Normal function consists of:

  • Simultaneous slow flash—heater working properly.
  • Concurrent fast flash—heating system is beginning to call for heat.

If you see a single light going on and off slowly and the other going on and off rapidly, your heating system may be having a low flame signal. This can take place even when your heater is working correctly. It signifies the flame sensing rod could need to be cleaned or in the bad spot on the burner. Call us at 302-231-1380 for support.

Here are some of the most routine errors for Lennox furnaces.

Furnace Won’t Start

Here are many of the light patterns you may notice when your heating system will not or stay on. The majority of these problems need to be repaired by an expert, such as one from Schagrin Gas Company.

  1. All LED lights aren’t lit. This means your HVAC system might not have electricity. Check the breaker box to make sure the heater fuse isn’t tripped. Try resetting the fuse if it has moved into the “off” position. If it promptly turns off following a reset, don’t touch the breaker and get in touch with us us at 302-231-1380.
  2. An individual light is continuous and the other is blinking slowly. This signifies the flame rollout switch is probably open. The switch is a critical safety device that helps in preventing fires and carbon monoxide. You shouldn’t seek to handle this malfunction yourself.
  3. A single light is flickering fast and the other is flickering slowly. This usually means power polarity has been inverted. Your heater could have a wiring fault that requires professional help from Schagrin Gas Company.
  4. The pair of lights are flickering slowly. This signifies your furnace’s blower motor possibly isn’t running. This component distributes heated air from the furnace into your residence. We can assist in figuring out what’s causing a problem with this component.
  5. A single light is flickering slowly and the other is flickering fast. This indicates your HVAC system may have low voltage or a short circuit. Reach out to our specialists at 302-231-1380 for help.
  6. One light is blinking on, on and off while the other flickers on, off, on. This signifies there might be an issue with your heating system’s control panel or wiring. Schagrin Gas Company can find the problem and fix it.
  7. Both lights display every other slow flickers. This indicates your heating system possibly has a flame error. There could be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 302-231-1380 for help.
  8. One light flashes slowly while the other is continuous. This often signifies your furnace’s limit switch is malfunctioning. The switch keeps your furnace from getting too hot. Call the pros at Schagrin Gas Company for assistance.

Heater Blower Operates But No Warm Air

Here’s what might be broken when you notice your heater’s blower fan working, but you aren’t gaining any warmth.

  • Both lights are showing alternate rapid blinks. This indicates your furnace ignitor could not be working. This component kindles gas in your HVAC equipment to create heat and should be fixed by a specialist from Schagrin Gas Company.

Depend on Us for Professional Furnace Repair

When you have to have your heater in working order quickly, trust the specialists at Schagrin Gas Company. Our pros will handle the problem promptly and have your house feeling relaxing again in no time. Call us at 302-231-1380 or contact us online to request an appointment now.

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