While your Lennox® furnace can’t talk to you, it possesses a way to communicate a furnace error.

Its control panel has twin LED lights that can share a fault code. Subject to the failure, your heating system may display steady or flashing lights.

While there are certain simple furnace repairs you can do yourself, most repairs are best left to experts. When your heater will not kick on or give heat, contact B & B Heating & Cooling at 314-325-7552 for expert furnace repair in Florissant and St. Charles.

Our experts will speedily detect and fix the issue, even if you don’t have a Lennox heater. We can service any kinds or configuration—and get the warmth returned to your home fast.

What Does the Flickering Light on My Heating System Mean?

Your furnace depends on lights to flash code when it isn’t working right. It also works these lights to relay it’s operating properly.

Regular function includes:

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

If you notice a lone light flashing slowly and the other blinking fast, your heating system could be having a low flame signal. This can occur even when your heating system is heating properly. It signifies the flame sensing rod could have buildup or in the wrong location on the burner. Reach out to us at 314-325-7552 for assistance.

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

Heater Will Not Turn On

Here are a few of the light sequences you might observe when your heater will not or keep operating. The bulk of these errors must be taken care of by an expert, for instance from B & B Heating & Cooling.

  1. The pair of LED lights aren’t lit. This indicates your HVAC system might not have power. Look at the breaker box to ensure the heating system fuse has not tripped. Attempt to reset the fuse if it’s in the “off” spot. If it rapidly turns off after you reset it, don’t try to reset it again and call us at 314-325-7552.
  2. A single light is unchanging and the other is flashing slowly. This shows the flame rollout switch is possibly open. The switch is a critical safety mechanism that assists in preventing fires and carbon monoxide. You shouldn’t attempt to fix this problem on your own.
  3. An individual light is flickering quickly and the other is flashing slowly. This typically signifies power polarity has been inverted. Your furnace could have a wiring error that calls for professional support from B & B Heating & Cooling.
  4. The pair of lights are blinking slowly. This indicates your furnace’s blower motor probably isn’t working. This piece circulates heated air from the furnace into your residence. We can assist in figuring out what’s wrong with this piece.
  5. One light is flickering slowly and the other is blinking quickly. This signifies your heater could have not enough voltage or a short circuit. Call our technicians at 314-325-7552 for assistance.
  6. One light is flickering on, on, off while the other blinks on, off, on. This indicates there could be trouble with your HVAC system’s control board or wiring. B & B Heating & Cooling can pinpoint the error and repair it.
  7. The duo of lights display every other slow flickers. This means your heating system possibly has a flame error. There may be a problem with its gas supply, gas valve or ignitor control. Reach out to us at 314-325-7552 for assistance.
  8. A single light blinks slowly while the other remains steady. This usually indicates your heating system’s limit switch is experiencing an error. The switch stops your heating system from becoming too warm. Get in touch with the professionals at B & B Heating & Cooling for support.

Heater Blower Works But No Warm Air

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

  • The pair of lights display every other fast flickers. This signifies your furnace ignitor might not be working. This component lights gas in your heating system to make warmth and should be serviced by an expert from B & B Heating & Cooling.

Depend on Us for Expert Furnace Repair

When you have to get your HVAC equipment in working order fast, turn to the experts at B & B Heating & Cooling. Our techs will repair the error quickly and have your rooms feeling cozy again soon. Get in touch with us at 314-325-7552 or contact us online to request an appointment right away.