While your Lennox® HVAC equipment can’t chat with you, it does have a process to communicate a furnace error.

Its motherboard has two LED lights that can display a fault code. Based on the malfunction, your heater may display continuous or flashing lights.

Although there are various simple HVAC fixes you can do yourself, many services are best left to experts. When your furnace won’t start or deliver warmth, call Pratt Brothers at 920-347-8495 for experienced furnace repair in Jefferson.

Our experts will quickly discover and repair the issue, even if you don’t use a Lennox heater. We can fix whichever types or makes—and get the heat reintroduced to your residence fast.

What Does the Flickering Light on My Heating System Mean?

Your heating system uses lights to flash code when it requires repairs. It also engages these lights to relay it’s working correctly.

Normal operation involves:

  • Simultaneous slow flash—heating system running properly.
  • Simultaneous fast flash—heater is starting to call for heat.

If you notice a solitary light blinking slowly and the other flashing fast, your furnace could be experiencing a low flame signal. This can happen even when your furnace is running like it should. It means the flame sensing rod could be dirty or in the incorrect spot on the burner. Contact us at 920-347-8495 for support.

Here are several other of the most common faults for Lennox HVAC systems.

Furnace Will Not Start

Here are a few of the light patterns you could notice when your furnace won’t turn on or keep heating. The bulk of these errors need to be handled by a specialist, for instance from Pratt Brothers.

  1. The duo of LED lights aren’t lit. This means your HVAC system might not have electricity. Look at the breaker box to make sure the furnace fuse is not tripped. You should reset the fuse if it’s in the “off” position. If it instantly trips after you reset it, don’t try to reset it again and call us at 920-347-8495.
  2. A single light is unchanging and the other is blinking slowly. This implies the flame rollout switch is likely not working right. The component is a critical safety tool that helps in avoiding fires and carbon monoxide. You shouldn’t seek to fix this issue on your own.
  3. One light is flashing fast and the other is flickering slowly. This often means power polarity has been transposed. Your heater could have a wiring fault that needs specialized support from Pratt Brothers.
  4. The duo of lights are flickering slowly. This signifies your furnace’s blower motor probably isn’t operating. This piece distributes heated air from the furnace into your house. We can help in pinpointing what’s wrong with this component.
  5. One light is blinking slowly and the other is flashing quickly. This indicates your heater may have not enough voltage or a short circuit. Get in touch with our technicians at 920-347-8495 for support.
  6. One light is flashing on, on, off while the other flickers on, off, on. This means there may be a fault with your HVAC system’s control panel or wiring. Pratt Brothers can pinpoint the error and take care of it.
  7. The duo of lights are using every other slow flickers. This indicates your heating system likely has a flame problem. There could be an issue with its gas supply, gas valve or ignitor control. Contact us at 920-347-8495 for assistance.
  8. An individual light flashes slowly while the other is solid. This typically signifies your HVAC system’s limit switch is not working. The switch keeps your heating system from becoming too warm. Reach out to the professionals at Pratt Brothers for support.

Heating System Blower Operates But No Heat

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

  • The pair of lights display every other fast blinks. This signifies your furnace ignitor may be broken. This part lights fuel in your heater to make warm air and should be fixed by an expert from Pratt Brothers.

Trust Us for Skilled Furnace Repair

When you need to have your heating system repaired quickly, trust the professionals at Pratt Brothers. Our technicians will fix the fault quickly and have your space feeling comfortable again in no time. Get in touch with us at 920-347-8495 or contact us online to request an appointment now.