While your Lennox® HVAC equipment isn’t able to talk to you, it has a way to communicate a furnace error.

Its control panel has a set of LED lights that can display a fault code. Depending on the problem, your furnace could use steady or flashing lights.

While there are some elementary HVAC fixes you can finish on your own, many repairs are best handled by experts. When your heater will not turn on or give heat, get in touch with McFadden Heating & Cooling at 519-683-2339 for professional furnace repair in Dresden.

Our technicians will rapidly determine and take care of the malfunction, even if you don’t own a Lennox heating system. We can service all kinds or configuration—and get the comfort reintroduced to your house fast.

What Does the Flickering Light on My Heating System Mean?

Your heating system relies on lights to flash code when it isn’t working right. It also uses these lights to tell you it’s working like it should.

Regular function involves:

  • Concurrent slow flash—heating system heating properly.
  • Both lights flash fast—furnace is beginning to call for heat.

If you see a lone light going on and off slowly and the other going on and off quickly, your furnace may have a low flame signal. This can occur even when your heater is heating like it should. It means the flame sensing rod might need to be cleaned or in the wrong spot on the burner. Reach out to us at 519-683-2339 for support.

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

Furnace Won’t Start

Here are some of the light sequences you may observe when your heater will not or keep operating. The bulk of these errors need to be repaired by a professional, like one from McFadden Heating & Cooling.

  1. The pair of LED lights aren’t lit. This signifies your heating system might not have electricity. Examine the breaker box to confirm the heating system fuse is not tripped. You should reset the fuse if it is in the “off” position. If it instantly trips after a subsequent reset, 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 implies the flame rollout switch is may be open. The switch is a critical safety device that assists in preventing fires and carbon monoxide. You shouldn’t attempt to handle this fault without professional help.
  3. One light is blinking rapidly and the other is blinking slowly. This often indicates power polarity has been transposed. Your heater might have a wiring fault that calls for professional aid from McFadden Heating & Cooling.
  4. The pair of lights are flickering slowly. This signifies your heating system’s blower motor possibly isn’t operating. This part sends heated air from the furnace into your house. We can assist in figuring out what’s wrong with this piece.
  5. One light is blinking slowly and the other is flickering rapidly. This means your HVAC system might have not enough voltage or a short circuit. Contact our experts at 519-683-2339 for support.
  6. One light is blinking on, on, off while the other flickers on, off, on. This indicates there might be an issue with your heating system’s control board or wiring. McFadden Heating & Cooling can locate the issue and fix it.
  7. The pair of lights display every other slow blinks. This signifies your HVAC equipment likely has a flame issue. There could be an issue with its gas supply, gas valve or ignitor control. Contact us at 519-683-2339 for support.
  8. An individual light flickers slowly while the other is steady. This often indicates your HVAC equipment’s limit switch is not working. The switch keeps your HVAC equipment from getting too hot. Call the pros at McFadden Heating & Cooling for assistance.

Furnace Blower Works But No Warm Air

Here’s what could be broken when you observe your heater’s blower fan running, but you aren’t getting any warmth.

  • The duo of lights are giving alternate quick flashes. This indicates your furnace ignitor may not be working. This part kindles energy in your heater to produce warm air and should be repaired by a specialist from McFadden Heating & Cooling.

Trust Us for Professional Furnace Repair

When you have to have your HVAC equipment fixed fast, depend on the experts at McFadden Heating & Cooling. Our pros will handle the fault right away and have your space feeling cozy again in a short time. Get in touch with us at 519-683-2339 or contact us online to schedule an appointment right away.