Furnace troubleshooting

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

While your Lennox® HVAC equipment can’t talk to you, it possesses a procedure to get your attention when there’s a furnace error.

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

While there are some simple heating adjustments you can finish without an expert, most repairs are best taken care of by the professionals. When your heater won’t kick on or put out warm air, call Honke Heating & AC at 503-663-8033 for expert furnace repair in Gresham.

Our specialists will speedily spot and take care of the breakdown, even if you don’t use a Lennox furnace. We can repair all kinds or models—and get the warmth reintroduced to your house quickly.


What Does the Flashing Light on My Heating System Mean?

Your heater relies on lights to flash code when it needs to be repaired. It also works these lights to relay it’s running correctly.

Regular operation consists of:

  • Both lights flash slowly—heater heating like it should.
  • Both lights flash fast—heater is initiating the call for heat.

If you see one light flashing slowly and the other flashing rapidly, your furnace may be having a low flame signal. This can happen even when your heating system is working like it should. It indicates the flame sensing rod could be dirty or in the wrong area on the burner. Contact us at 503-663-8033 for assistance.

Here are several other of the most routine issues for Lennox heating systems.

Furnace Will Not Turn On

Here are some of the light patterns you could see when your heater won’t turn on or stay on. Most of these issues need to be taken care of by a specialist, for instance from Honke Heating & AC.

  1. All LED lights are extinguished. This indicates your HVAC system might not be receiving power. Check the breaker box to confirm the furnace fuse has not flipped. Attempt to reset the fuse if it has moved into the “off” position. If it promptly trips following a reset, don’t touch the breaker and contact us at 503-663-8033.
  2. An individual light is continuous and the other is flickering slowly. This shows the flame rollout switch is likely malfunctioning. The component is an important safety device that aids in avoiding fires and carbon monoxide. You shouldn’t seek to handle this problem without professional help.
  3. One light is blinking fast and the other is flickering slowly. This often means power polarity has been inverted. Your heater could have a wiring fault that needs professional aid from Honke Heating & AC.
  4. The pair of lights are flashing slowly. This signifies your heater’s blower motor possibly isn’t running. This piece moves hot air from the heater into your residence. We can assist in figuring out what’s wrong with this part.
  5. One light is flashing slowly and the other is flickering quickly. This indicates your heater might have not enough voltage or a short circuit. Reach out to our professionals at 503-663-8033 for assistance.
  6. One light is blinking on, on and off while the other blinks on, off, on. This signifies there may be a malfunction with your HVAC system’s control board or wiring. Honke Heating & AC can find the fault and fix it.
  7. The pair of lights display every other slow blinks. This signifies your heating system likely has a flame failure. There might be trouble with its gas supply, gas valve or ignitor control. Contact us at 503-663-8033 for support.
  8. An individual light blinks slowly while the other stays continuous. This typically means your HVAC system’s limit switch is open. The switch stops your HVAC system from getting too hot. Call the pros at Honke Heating & AC for support.

Heater Blower Runs But No Warm Air

Here’s what might be at fault when you hear your furnace’s blower fan working, but you aren’t getting any warmth.

  • Both lights are showing alternating rapid blinks. This means your furnace ignitor might be broken. This part ignites energy in your furnace to produce warmth and should be serviced by a professional from Honke Heating & AC.

Turn to Us for Professional Furnace Repair

When you need to get your heater in working order without delay, turn to the specialists at Honke Heating & AC. Our techs will take care of the issue promptly and have your residence feeling cozy again in no time. Reach out to us at 503-663-8033 or contact us online to schedule an appointment now.

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