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

Its motherboard has two LED lights that can show a fault code. Subject to the malfunction, your heater may show continuous or flashing lights.

While there are various elementary heating repairs you can finish yourself, the majority of repairs are best taken care of by HVAC technicians. When your heating system refuses to turn on or provide heat, call B & G HVAC at 641-316-3360 for expert furnace repair in Marshalltown.

Our technicians will swiftly detect and repair the issue, even if you don’t have a Lennox heating system. We can service all brands or configuration—and get the warmth returned to your house fast.

What Does the Flashing Light on My Heater Mean?

Your furnace uses lights to flash code when it requires repairs. It also uses this system to tell you it’s working correctly.

Normal operation includes:

  • Concurrent slow flash—heater running properly.
  • Concurrent fast flash—furnace is initiating the call for heat.

If you notice a lone light blinking slowly and the other going on and off rapidly, your heater might be experiencing a low flame signal. This can occur even when your furnace is operating correctly. It means the flame sensing rod might need to be cleaned or in the incorrect spot on the burner. Contact us at 641-316-3360 for support.

Here are a few other of the most common problems for Lennox furnaces.

Furnace Won’t Start

Here are some of the light sequences you may see when your furnace refuses to or keep running. The majority of these errors must be taken care of by a specialist, like one from B & G HVAC.

  1. The duo of LED lights aren’t lit. This signifies your heating system might not have electricity. Go to the breaker box to make sure the furnace fuse has not triggered. You should reset the fuse if it’s in the “off” area. If it rapidly trips following a reset, don’t try to reset it again and contact us at 641-316-3360.
  2. A single light is stable and the other is flickering slowly. This shows the flame rollout switch is possibly not working right. The switch is an essential safety guard that assists in avoiding fires and carbon monoxide. You shouldn’t attempt to take care of this fault yourself.
  3. One light is blinking rapidly and the other is blinking slowly. This likely indicates power polarity has been reversed. Your heating system might have a wiring error that requires specialized support from B & G HVAC.
  4. The duo of lights are flashing slowly. This indicates your heating system’s blower motor possibly isn’t running. This component circulates heated air from the heating system into your space. We can help in determining what’s causing an issue with this component.
  5. One light is flickering slowly and the other is flashing fast. This indicates your HVAC system may have low voltage or a short circuit. Contact our experts at 641-316-3360 for support.
  6. One light is blinking on, on, off while the other flashes on, off, on. This signifies there could be an issue with your heater’s control panel or wiring. B & G HVAC can determine the error and handle it.
  7. The pair of lights are using every other slow flickers. This indicates your HVAC system may have a flame problem. There may be a problem with its gas supply, gas valve or ignitor control. Reach out to us at 641-316-3360 for support.
  8. A single light flashes slowly while the other remains solid. This typically signifies your HVAC equipment’s limit switch is malfunctioning. The switch stops your heating system from overheating. Reach out to the experts at B & G HVAC for assistance.

Furnace Blower Operates But No Warmth

Here’s what may be at fault when you notice your heating equipment’s blower fan running, but you aren’t gaining any heated air.

  • The pair of lights are giving alternate quick flashes. This signifies your furnace ignitor could not be in working order. This part lights energy in your HVAC equipment to produce warm air and should be repaired by a specialist from B & G HVAC.

Turn to Us for Expert Furnace Repair

When you have to get your heater repaired quickly, depend on the experts at B & G HVAC. Our technicians will take care of the issue quickly and have your space feeling cozy again in no time. Get in touch with us at 641-316-3360 or contact us online to request an appointment today.