While your Lennox® heater isn’t able to speak to you, it possesses a method to communicate a furnace error.

Its control panel has a set of LED lights that can show a fault code. Depending on the failure, your heating system might show steady or flashing lights.

Although there are various elementary furnace fixes you can finish without an expert, many fixes are best handled by the professionals. When your heater will not start or deliver heated air, contact GV Heating & Air at 763-535-2000 for experienced furnace repair in Crystal and Twin Cities.

Our experts will quickly detect and take care of the malfunction, even if you don’t use a Lennox heating system. We can fix whichever types or makes—and get the warmth reintroduced to your home quickly.

What Does the Flashing Light on My Heating System Mean?

Your heating system depends on lights to flash code when it isn’t working right. It also works these lights to let you know it’s operating correctly.

Correct function involves:

  • Simultaneous slow flash—heater operating properly.
  • Simultaneous fast flash—furnace is initiating the call for heat.

If you see a single light blinking slowly and the other going on and off fast, your heater might be experiencing a low flame signal. This can take place even when your furnace is running like it should. It indicates the flame sensing rod may need to be cleaned or in the incorrect area on the burner. Call us at 763-535-2000 for assistance.

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

Furnace Refuses to Turn On

Here are some of the light sequences you may notice when your furnace will not or keep operating. The majority of these issues have to be taken care of by a specialist, for instance from GV Heating & Air.

  1. The duo of LED lights aren’t lit. This means your HVAC system might not have electricity. Go to the breaker box to make sure the heating system fuse has not triggered. Attempt to reset the fuse if it’s in the “off” spot. If it instantly flips following a reset, don’t try to reset it again and call us at 763-535-2000.
  2. One light is continuous and the other is flashing slowly. This shows the flame rollout switch is likely not working right. The part is a critical safety tool that helps in preventing fires and carbon monoxide. You shouldn’t attempt to fix this issue on your own.
  3. An individual light is flashing rapidly and the other is flickering slowly. This often indicates power polarity has been transposed. Your heating system might have a wiring error that needs expert help from GV Heating & Air.
  4. Both lights are blinking slowly. This indicates your heater’s blower motor probably isn’t running. This piece sends hot air from the HVAC system into your residence. We can help in figuring out what’s causing a problem with this component.
  5. An individual light is flashing slowly and the other is blinking quickly. This signifies your heater may have insufficient voltage or a short circuit. Call our technicians at 763-535-2000 for help.
  6. One light is flashing on, on, off while the other flashes on, off, on. This indicates there may be an issue with your heater’s control board or wiring. GV Heating & Air can locate the fault and take care of it.
  7. The duo of lights are using alternating slow flickers. This means your heater likely has a flame problem. There might be a problem with its gas supply, gas valve or ignitor control. Reach out to us at 763-535-2000 for support.
  8. An individual light blinks slowly while the other stays continuous. This typically signifies your heater’s limit switch is not working. The switch keeps your HVAC system from becoming too warm. Get in touch with the experts at GV Heating & Air for assistance.

Heating System Blower Runs But No Heat

Here’s what could be broken when you notice your heating system’s blower fan on, but you aren’t getting any warmth.

  • The pair of lights are showing every other rapid blinks. This indicates your furnace ignitor may not be working. This component ignites gas in your furnace to produce warm air and should be repaired by a specialist from GV Heating & Air.

Depend on Us for Expert Furnace Repair

When you need to get your heater in working order without delay, trust the technicians at GV Heating & Air. Our pros will fix the fault right away and have your rooms feeling cozy again soon. Reach out to us at 763-535-2000 or contact us online to get an appointment right away.