While your Lennox® HVAC equipment can’t chat with you, it possesses a procedure to tell you about a furnace error.

Its control board has two LED lights that can display a fault code. Based on the issue, your heating system could display solid or flashing lights.

Though there are various simple HVAC adjustments you can complete yourself, the majority of tasks are best left to the professionals. When your heating system will not turn on or provide heated air, reach out to McFadden Heating & Cooling at 519-683-2339 for professional furnace repair in Dresden.

Our technicians will swiftly discover and handle the issue, even if you don’t use a Lennox heating system. We can repair any brands or configuration—and get the warmth returned to your home quickly.

What Does the Flashing Light on My Furnace Mean?

Your heating system relies on lights to flash code when it is malfunctioning. It also engages this setup to tell you it’s operating correctly.

Regular heating includes:

  • Simultaneous slow flash—heater working like it should.
  • Simultaneous fast flash—furnace is starting to call for heat.

If you realize that a single light blinking slowly and the other going on and off fast, your furnace may be experiencing a low flame signal. This can occur even when your heating system is operating properly. It indicates the flame sensing rod may be dirty or in the incorrect area on the burner. Contact us at 519-683-2339 for support.

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

Heating System Will Not Start

Here are many of the light patterns you could see when your heating system won’t turn on or keep running. Most of these errors need to be fixed by an expert, like one from McFadden Heating & Cooling.

  1. All LED lights aren’t lit. This indicates your HVAC system might not be receiving power. Go to the breaker box to ensure the heating system fuse has not tripped. Try resetting the fuse if it’s in the “off” position. If it promptly flips after you reset it, don’t try to reset it again and call us at 519-683-2339.
  2. A single light is stable and the other is flickering slowly. This shows the flame rollout switch is possibly open. The component is an essential safety device that helps in stopping fires and carbon monoxide. You shouldn’t seek to handle this malfunction yourself.
  3. One light is flickering quickly and the other is flashing slowly. This likely signifies power polarity has been transposed. Your furnace might have a wiring fault that requires expert assistance from McFadden Heating & Cooling.
  4. Both lights are blinking slowly. This indicates your heater’s blower motor probably isn’t operating. This piece distributes warm air from the heater into your home. We can assist in pinpointing what’s causing an issue with this component.
  5. A single light is blinking slowly and the other is flickering fast. This means your heating system might have insufficient voltage or a short circuit. Reach out to our technicians at 519-683-2339 for support.
  6. One light is flickering on, on, off while the other blinks on, off, on. This signifies there may be an issue with your HVAC system’s control board or wiring. McFadden Heating & Cooling can locate the issue and repair it.
  7. Both lights display alternate slow flickers. This signifies your HVAC equipment may have a flame failure. There could be a problem with its gas supply, gas valve or ignitor control. Contact us at 519-683-2339 for help.
  8. An individual light flashes slowly while the other remains steady. This usually signifies your HVAC system’s limit switch is experiencing an error. The switch keeps your HVAC system from getting too hot. Get in touch with the pros at McFadden Heating & Cooling for support.

Furnace Blower Operates But No Warmth

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

  • The pair of lights are giving every other rapid blinks. This signifies your furnace ignitor could not be working. This component kindles energy in your HVAC equipment to create heat and should be serviced by a specialist from McFadden Heating & Cooling.

Trust Us for Professional Furnace Repair

When you need to have your heater fixed without delay, turn to the technicians at McFadden Heating & Cooling. Our pros will repair the error without delay and have your rooms feeling comfortable again in a short time. Get in touch with us at 519-683-2339 or contact us online to get an appointment right away.