Furnace troubleshooting

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

While your Lennox® HVAC equipment isn’t able to talk to you, it possesses a procedure to tell you about a furnace error.

Its control board has two LED lights that can show a fault code. Depending on the issue, your heating system could use solid or flashing lights.

While there are various elementary heating adjustments you can finish on your own, many repairs are best handled by HVAC technicians. When your heating system won’t kick on or give heat, contact Anderson Heating & A/C at 775-230-7628 for professional furnace repair in Carson City.

Our experts will rapidly discover and take care of the failure, even if you don’t have a Lennox heating system. We can repair any types or configuration—and get the heat reintroduced to your residence fast.


What Does the Flashing Light on My Heater Mean?

Your furnace relies on lights to flash code when it requires repairs. It also works these lights to tell you it’s operating correctly.

Regular heating consists of:

  • Simultaneous slow flash—heater heating correctly.
  • Both lights flash fast—heating system is starting to call for heat.

If you notice a single light going on and off slowly and the other going on and off fast, your furnace may 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 may need to be cleaned or in the incorrect location on the burner. Contact us at 775-230-7628 for assistance.

Here are some of the most typical faults for Lennox heating systems.

Furnace Will Not Turn On

Here are many of the light sequences you could notice when your furnace refuses to or keep running. The bulk of these problems need to be repaired by a technician, like one from Anderson Heating & A/C.

  1. The pair of LED lights are extinguished. This signifies your heating system might not have electricity. Check the breaker box to confirm the furnace fuse hasn’t flipped. Try resetting the fuse if it has moved into the “off” position. If it instantly flips after a subsequent reset, don’t touch the breaker and call us at 775-230-7628.
  2. One light is unchanging and the other is flashing slowly. This implies the flame rollout switch is probably open. The switch is a critical safety mechanism that helps in preventing fires and carbon monoxide. You shouldn’t seek to handle this fault without professional help.
  3. A single light is flashing fast and the other is flickering slowly. This usually means power polarity has been reversed. Your furnace might have a wiring error that requires specialized aid from Anderson Heating & A/C.
  4. The pair of lights are blinking slowly. This means your furnace’s blower motor possibly isn’t running. This piece sends hot air from the heater into your home. We can help in pinpointing what’s wrong with this part.
  5. An individual light is flashing slowly and the other is flashing rapidly. This means your HVAC system may have not enough voltage or a short circuit. Get in touch with our technicians at 775-230-7628 for support.
  6. One light is flickering on, on and off while the other flashes on, off, on. This indicates there could be an issue with your furnace’s control board or wiring. Anderson Heating & A/C can locate the issue and take care of it.
  7. The pair of lights display alternating slow flickers. This means your HVAC equipment may have a flame issue. There may be trouble with its gas supply, gas valve or ignitor control. Call us at 775-230-7628 for help.
  8. An individual light flashes slowly while the other remains solid. This typically signifies your furnace’s limit switch is not working. The switch prevents your HVAC system from getting too hot. Reach out to the experts at Anderson Heating & A/C for help.

Heater Blower Runs But No Warmth

Here’s what might be broken when you notice your heating system’s blower fan running, but you aren’t receiving any warmth.

  • The duo of lights are showing alternate rapid flickers. This signifies your furnace ignitor may not be in working order. This component ignites energy in your heating system to produce heat and should be repaired by an expert from Anderson Heating & A/C.

Turn to Us for Professional Furnace Repair

When you have to get your heating system in working order without delay, depend on the technicians at Anderson Heating & A/C. Our pros will fix the error without delay and have your rooms feeling cozy again in no time. Contact us at 775-230-7628 or contact us online to request an appointment now.

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