While your Lennox® HVAC equipment isn’t able to speak to you, it has a method to get your attention when there’s a furnace error.

Its motherboard has two LED lights that can display a fault code. Subject to the problem, your heating system could use continuous or flashing lights.

Though there are some simple HVAC fixes you can finish yourself, most repairs are best left to the professionals. When your furnace refuses to turn on or give warmth, reach out to Enertek Air Conditioning & Heating at (818) 727-9993 for professional furnace repair in Northridge.

Our experts will swiftly detect and handle the issue, even if you don’t use a Lennox heating system. We can fix whichever brands or configuration—and get the warmth returned to your home without delay.

What Does the Flashing Light on My Heater Mean?

Your heating system relies on lights to flash code when it is malfunctioning. It also engages this system to let you know it’s heating properly.

Normal heating involves:

  • Simultaneous slow flash—heating system heating properly.
  • Both lights flash fast—heating system is initiating the call for heat.

If you realize that a single light flashing slowly and the other blinking quickly, your heating system could be having a low flame signal. This can occur even when your heating system is working properly. It means the flame sensing rod could need to be cleaned or in the incorrect spot on the burner. Reach out to us at (818) 727-9993 for support.

Here are a few other of the most common problems for Lennox furnaces.

Furnace Refuses to Start

Here are many of the light sequences you may notice when your heating system refuses to or keep operating. Most of these problems need to be handled by a professional, like one from Enertek Air Conditioning & Heating.

  1. The pair of LED lights are off. This indicates your heating system might not be receiving power. Go to the breaker box to make sure the heating system fuse has not triggered. You should reset the fuse if it’s in the “off” spot. If it immediately turns off following a reset, don’t try to reset it again and contact us at (818) 727-9993.
  2. An individual light is stable and the other is flashing slowly. This signifies the flame rollout switch is possibly open. The switch is a critical safety mechanism that aids in preventing fires and carbon monoxide. You shouldn’t try to repair this fault on your own.
  3. One light is blinking rapidly and the other is flashing slowly. This often means power polarity has been reversed. Your heater might have a wiring problem that requires expert aid from Enertek Air Conditioning & Heating.
  4. The pair of lights are flashing slowly. This signifies your furnace’s blower motor likely isn’t working. This piece sends warm air from the heating system into your space. We can help in determining what’s wrong with this piece.
  5. An individual light is flashing slowly and the other is flashing fast. This means your heating system might have insufficient voltage or a short circuit. Contact our technicians at (818) 727-9993 for help.
  6. One light is flickering on, on, off while the other flickers on, off, on. This means there could be trouble with your heater’s control board or wiring. Enertek Air Conditioning & Heating can locate the error and handle it.
  7. Both lights show alternate slow flickers. This indicates your HVAC equipment possibly has a flame issue. There may be an issue with its gas supply, gas valve or ignitor control. Reach out to us at (818) 727-9993 for help.
  8. An individual light blinks slowly while the other remains continuous. This typically signifies your HVAC equipment’s limit switch is not working. The switch keeps your heating system from becoming too warm. Get in touch with the professionals at Enertek Air Conditioning & Heating for assistance.

Furnace Blower Works But No Heat

Here’s what may be wrong when you hear your heater’s blower fan running, but you aren’t gaining any warmth.

  • Both lights are giving alternate rapid blinks. This means your furnace ignitor could not be working. This piece kindles fuel in your HVAC equipment to produce warm air and should be fixed by a specialist from Enertek Air Conditioning & Heating.

Turn to Us for Skilled Furnace Repair

When you have to have your heating system repaired without delay, turn to the experts at Enertek Air Conditioning & Heating. Our technicians will repair the error right away and have your house feeling comfortable again in a short time. Reach out to us at (818) 727-9993 or contact us online to get an appointment now.