While your Lennox® heating system isn’t able to speak to you, it does have a procedure to tell you about a furnace error.

Its control board has a set of LED lights that can show a fault code. Depending on the failure, your heating system could use continuous or flashing lights.

Though there are some basic HVAC fixes you can do on your own, many repairs are best left to HVAC technicians. When your heater will not kick on or provide warm air, contact Retro HVAC Service & Installation at 267-277-3851 for professional furnace repair in Philadelphia.

Our technicians will quickly discover and fix the breakdown, even if you don’t have a Lennox heater. We can service any types or configuration—and get the comfort reintroduced to your home quickly.

What Does the Flickering Light on My Furnace Mean?

Your furnace uses lights to flash code when it requires repairs. It also works this system to relay it’s working properly.

Normal heating involves:

  • Concurrent slow flash—heating system operating like it should.
  • Simultaneous fast flash—heater is beginning to call for heat.

If you notice a lone light blinking slowly and the other blinking fast, your furnace might have a low flame signal. This can occur even when your furnace is heating properly. It indicates the flame sensing rod may have buildup or in the incorrect spot on the burner. Reach out to us at 267-277-3851 for assistance.

Here are a few other of the most routine problems for Lennox heating systems.

Furnace Refuses to Turn On

Here are some of the light sequences you may observe when your heating system refuses to or keep running. Most of these errors have to be fixed by an expert, for instance from Retro HVAC Service & Installation.

  1. The duo of LED lights are off. This signifies your heating system might not have power. Examine the breaker box to ensure the heating system fuse hasn’t tripped. You should reset the fuse if it’s in the “off” spot. If it instantly flips following a reset, don’t touch the breaker and get in touch with us us at 267-277-3851.
  2. A single light is unchanging and the other is flashing slowly. This signifies the flame rollout switch is possibly open. The switch is an essential safety device that helps in stopping fires and carbon monoxide. You shouldn’t seek to take care of this fault yourself.
  3. An individual light is flickering fast and the other is flashing slowly. This likely indicates power polarity has been transposed. Your heating system might have a wiring error that requires specialized assistance from Retro HVAC Service & Installation.
  4. All lights are blinking slowly. This means your furnace’s blower motor likely isn’t running. This part moves heated air from the HVAC system into your rooms. We can aid in pinpointing what’s causing a problem with this component.
  5. An individual light is blinking slowly and the other is blinking quickly. This signifies your HVAC system might have low voltage or a short circuit. Contact our technicians at 267-277-3851 for help.
  6. One light is flashing on, on, off while the other flashes on, off, on. This signifies there may be a malfunction with your heater’s control board or wiring. Retro HVAC Service & Installation can find the problem and repair it.
  7. Both lights are using every other slow blinks. This means your heater possibly has a flame issue. There might be a problem with its gas supply, gas valve or ignitor control. Get in touch with us at 267-277-3851 for assistance.
  8. A single light flashes slowly while the other remains continuous. This typically signifies your heater’s limit switch is experiencing an error. The switch stops your heating system from getting too hot. Reach out to the specialists at Retro HVAC Service & Installation for support.

Furnace Blower Runs But No Warmth

Here’s what might be broken when you notice your heating system’s blower fan running, but you aren’t receiving any heated air.

  • The pair of lights are giving alternate rapid flickers. This signifies your furnace ignitor might not be working. This piece kindles fuel in your HVAC equipment to produce heat and should be fixed by an expert from Retro HVAC Service & Installation.

Depend on Us for Professional Furnace Repair

When you have to get your heating system fixed fast, trust the experts at Retro HVAC Service & Installation. Our pros will handle the error right away and have your residence feeling relaxing again in no time. Reach out to us at 267-277-3851 or contact us online to request an appointment now.