While your Lennox® heater can’t chat with you, it does have a way to get your attention when there’s a furnace error.

Its motherboard has double LED lights that can show a fault code. Based on the failure, your heater may show continuous or flashing lights.

Although there are some simple furnace fixes you can take care of yourself, the majority of tasks are best handled by HVAC technicians. When your furnace will not turn on or give warmth, contact Temperature Doctors Heating & Cooling at (815) 914-6197 for experienced furnace repair in Rockford.

Our specialists will swiftly detect and fix the problem, even if you don’t have a Lennox heating system. We can fix whichever types or makes—and get the warmth reintroduced to your home fast.

What Does the Blinking Light on My Heater Mean?

Your furnace depends on lights to flash code when it isn’t working right. It also works this setup to relay it’s heating properly.

Regular operation consists of:

  • Simultaneous slow flash—furnace heating correctly.
  • Concurrent fast flash—heater is beginning to call for heat.

If you see a solitary light going on and off slowly and the other flashing rapidly, your heating system may have a low flame signal. This can take place even when your furnace is working like it should. It means the flame sensing rod could be dirty or in the wrong location on the burner. Contact us at (815) 914-6197 for support.

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

Heating System Won’t Kick On

Here are many of the light sequences you may notice when your furnace will not or keep heating. The majority of these problems need to be taken care of by a technician, like one from Temperature Doctors Heating & Cooling.

  1. All LED lights are off. This means your heating system might not have electricity. Go to the breaker box to ensure the heater fuse has not flipped. Try resetting the fuse if it’s in the “off” spot. If it rapidly turns off after a subsequent reset, don’t try to reset it again and call us at (815) 914-6197.
  2. An individual light is stable and the other is flickering slowly. This shows the flame rollout switch is possibly open. The switch is a critical safety tool that aids in stopping fires and carbon monoxide. You shouldn’t try to handle this malfunction without professional help.
  3. One light is flickering quickly and the other is blinking slowly. This often means power polarity has been transposed. Your heating system may have a wiring fault that calls for expert aid from Temperature Doctors Heating & Cooling.
  4. The pair of lights are flashing slowly. This indicates your heating system’s blower motor likely isn’t running. This part sends heated air from the heating system into your space. We can help in pinpointing what’s causing a problem with this part.
  5. An individual light is flickering slowly and the other is flashing rapidly. This means your heating system might have not enough voltage or a short circuit. Call our technicians at (815) 914-6197 for assistance.
  6. One light is flashing on, on, off while the other flashes on, off, on. This signifies there might be trouble with your heating system’s motherboard or wiring. Temperature Doctors Heating & Cooling can pinpoint the fault and fix it.
  7. The duo of lights display alternate slow flashes. This indicates your HVAC equipment may have a flame problem. There might be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at (815) 914-6197 for assistance.
  8. An individual light blinks slowly while the other remains solid. This often means your heating system’s limit switch is experiencing an error. The switch stops your HVAC equipment from getting too hot. Call the professionals at Temperature Doctors Heating & Cooling for support.

Heating System Blower Runs But No Warm Air

Here’s what may be at fault when you observe your heating system’s blower fan working, but you aren’t getting any warmth.

  • Both lights are showing every other fast flickers. This signifies your furnace ignitor might not be working. This component lights fuel in your heater to create heat and should be repaired by a technician from Temperature Doctors Heating & Cooling.

Turn to Us for Skilled Furnace Repair

When you have to have your heater repaired fast, trust the technicians at Temperature Doctors Heating & Cooling. Our techs will take care of the issue without delay and have your house feeling relaxing again in no time. Contact us at (815) 914-6197 or contact us online to schedule an appointment right away.