Furnace troubleshooting

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

While your Lennox® HVAC equipment cannot chat with you, it possesses a process to tell you about a furnace error.

Its control panel has a set of LED lights that can show a fault code. Subject to the fault, your heating system could display continuous or flashing lights.

Although there are certain elementary furnace fixes you can finish on your own, most repairs are best left to the professionals. When your heating system will not kick on or give warmth, get in touch with Heartland Heating & Cooling at 515-344-3579 for experienced furnace repair in Des Moines.

Our specialists will speedily identify and handle the fault, even if you don’t own a Lennox heater. We can service whichever brands or models—and get the comfort reintroduced to your residence without delay.

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What Does the Blinking Light on My Heater Mean?

Your furnace relies on lights to flash code when it is malfunctioning. It also engages this setup to let you know it’s running like it should.

Correct heating includes:

  • Concurrent slow flash—heater operating like it should.
  • Both lights flash fast—heating system is beginning to call for heat.

If you realize that a solitary light going on and off slowly and the other flashing rapidly, your heater might be having a low flame signal. This can occur even when your heater is heating correctly. It indicates the flame sensing rod could have build-up or in the bad area on the burner. Contact us at 515-344-3579 for support.

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

Heater Refuses to Kick On

Here are a few of the light arrangements you may observe when your heat refuses to or keep heating. The bulk of these errors have to be handled by a professional, for instance from Heartland Heating & Cooling.

  1. All LED lights aren’t lit. This means your furnace might not be receiving power. Examine the breaker box to ensure the furnace fuse isn’t flipped. You should reset the fuse if it’s in the “off” area. If it promptly trips following a reset, don’t try to reset it again and call us at 515-344-3579.
  2. A single light is solid and the other is flickering slowly. This signifies the flame rollout switch is likely not working right. The part is an essential safety tool that helps in stopping fires and carbon monoxide. You shouldn’t try to handle this malfunction without professional help.
  3. A single light is flashing rapidly and the other is flickering slowly. This likely indicates power polarity has been reversed. Your heating system may have a wiring fault that requires professional aid from Heartland Heating & Cooling.
  4. The pair of lights are flickering slowly. This means your furnace’s blower motor likely isn’t running. This part distributes warm air from the furnace into your space. We can assist in figuring out what’s causing a problem with this part.
  5. An individual light is flickering slowly and the other is blinking rapidly. This means your furnace could have not enough voltage or a short circuit. Call our technicians at 515-344-3579 for support.
  6. One light is blinking on, on and off while the other flickers on, off, on. This means there might be trouble with your HVAC system’s motherboard or wiring. Heartland Heating & Cooling can locate the error and take care of it.
  7. Both lights are using alternate slow flickers. This indicates your furnace likely has a flame error. There could be a problem with its gas supply, gas valve or ignitor control. Call us at 515-344-3579 for assistance.
  8. An individual light flashes slowly while the other stays continuous. This typically signifies your furnace’s limit switch is malfunctioning. The switch prevents your HVAC system from getting too hot. Reach out to the specialists at Heartland Heating & Cooling for support.

Heating System Blower Runs But No Warmth

Here’s what may be at fault when you hear your heater’s blower fan on, but you aren’t getting any heated air.

  • The pair of lights are giving alternate quick flashes. This signifies your furnace ignitor could be broken. This piece lights fuel in your heater to make heat and should be fixed by a specialist from Heartland Heating & Cooling.

Trust Us for Expert Furnace Repair

When you need to get your HVAC equipment in working order fast, trust the professionals at Heartland Heating & Cooling. Our technicians will handle the problem promptly and have your rooms feeling cozy again soon. Call us at 515-344-3579 or contact us online to request an appointment right away.

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