Furnace troubleshooting

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

While your Lennox® heater cannot talk to you, it has a procedure to tell you about a furnace error.

Its control board has twin LED lights that can show a fault code. Based on the issue, your furnace may use continuous or flashing lights.

While there are certain basic HVAC adjustments you can complete on your own, the majority of repairs are best left to the professionals. When your heater refuses to kick on or provide warm air, call Cool Power LLC at 631-246-4029 for skilled furnace repair in Ronkonkoma.

Our experts will speedily determine and take care of the issue, even if you don’t own a Lennox furnace. We can repair any types or models—and get the comfort restored to your house fast.


What Does the Flickering Light on My Heating System Mean?

Your heating system uses lights to flash code when it is malfunctioning. It also works this setup to let you know it’s working properly.

Correct operation includes:

  • Both lights flash slowly—furnace heating properly.
  • Both lights flash fast—furnace is beginning to call for heat.

If you see a solitary light flashing slowly and the other going on and off rapidly, your furnace may be experiencing a low flame signal. This can happen even when your furnace is operating properly. It signifies the flame sensing rod could need to be cleaned or in the bad location on the burner. Contact us at 631-246-4029 for assistance.

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

Heater Refuses to Kick On

Here are a few of the light sequences you could observe when your heating system won’t turn on or stay on. The majority of these issues must be taken care of by a professional, such as one from Cool Power LLC .

  1. The pair of LED lights aren’t lit. This means your HVAC system might not have electricity. Check the breaker box to ensure the heater fuse isn’t flipped. Try resetting the fuse if it is in the “off” position. If it instantly trips after a subsequent reset, don’t touch the breaker and call us at 631-246-4029.
  2. One light is solid and the other is blinking slowly. This means the flame rollout switch is probably malfunctioning. The component is an essential safety device that helps in preventing fires and carbon monoxide. You shouldn’t seek to repair this fault on your own.
  3. An individual light is flashing quickly and the other is blinking slowly. This often means power polarity has been reversed. Your heating system might have a wiring fault that requires specialized help from Cool Power LLC .
  4. Both lights are flickering slowly. This signifies your heating system’s blower motor probably isn’t running. This piece circulates warm air from the heater into your rooms. We can aid in figuring out what’s causing an issue with this piece.
  5. An individual light is flickering slowly and the other is flickering quickly. This indicates your heating system may have not enough voltage or a short circuit. Reach out to our specialists at 631-246-4029 for support.
  6. One light is flashing on, on and off while the other flashes on, off, on. This means there may be trouble with your furnace’s control panel or wiring. Cool Power LLC can determine the fault and fix it.
  7. The duo of lights display every other slow flickers. This indicates your furnace may have a flame problem. There may be a problem with its gas supply, gas valve or ignitor control. Contact us at 631-246-4029 for assistance.
  8. One light blinks slowly while the other is continuous. This typically indicates your HVAC system’s limit switch is not working. The switch prevents your heater from getting too hot. Reach out to the experts at Cool Power LLC for help.

Heating System Blower Operates But No Warmth

Here’s what could be wrong when you observe your furnace’s blower fan working, but you aren’t gaining any heated air.

  • The duo of lights display alternating rapid flashes. This indicates your furnace ignitor may not be in working order. This part ignites fuel in your furnace to produce warm air and should be fixed by a specialist from Cool Power LLC .

Turn to Us for Professional Furnace Repair

When you have to get your HVAC equipment repaired without delay, trust the experts at Cool Power LLC . Our techs will repair the problem quickly and have your rooms feeling relaxing again soon. Call us at 631-246-4029 or contact us online to request an appointment today.

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