Furnace troubleshooting

Most Frequent Lennox® Furnace Error Codes (and What They Mean)

While your Lennox® heater isn’t able to speak to you, it has a procedure to communicate a furnace error.

Its control board has double LED lights that can display a fault code. Depending on the issue, your furnace may show continuous or flashing lights.

While there are certain basic heating repairs you can do without an expert, the majority of fixes are best taken care of by HVAC technicians. When your furnace will not start or give warm air, call Tokay Heating and Air Conditioning at 209-257-3156 for experienced furnace repair in Lodi.

Our technicians will speedily detect and repair the fault, even if you don’t have a Lennox heater. We can repair all kinds or models—and get the comfort returned to your house quickly.


What Does the Blinking Light on My Heater Mean?

Your heater depends on lights to flash code when it is malfunctioning. It also works these lights to relay it’s working properly.

Correct heating involves:

  • Concurrent slow flash—furnace heating correctly.
  • Simultaneous fast flash—furnace is initiating the call for heat.

If you realize that a lone light flashing slowly and the other blinking quickly, your heater may be having a low flame signal. This can happen even when your furnace is operating like it should. It signifies the flame sensing rod might need to be cleaned or in the incorrect location on the burner. Reach out to us at 209-257-3156 for support.

Here are some of the most routine problems for Lennox HVAC systems.

Heating System Won’t Start

Here are many of the light patterns you could observe when your furnace will not or keep operating. The bulk of these issues have to be handled by a professional, for instance from Tokay Heating and Air Conditioning.

  1. All LED lights aren’t lit. This indicates your HVAC system might not have electricity. Look at the breaker box to make sure the heater fuse is not flipped. Try resetting the fuse if it has moved into the “off” area. If it rapidly turns off following a reset, don’t try to reset it again and contact us at 209-257-3156.
  2. An individual light is solid and the other is flickering slowly. This implies the flame rollout switch is likely not working right. The switch is an important safety mechanism that helps in stopping fires and carbon monoxide. You shouldn’t seek to handle this fault yourself.
  3. An individual light is flickering fast and the other is flickering slowly. This likely signifies power polarity has been inverted. Your heating system may have a wiring issue that requires professional aid from Tokay Heating and Air Conditioning.
  4. All lights are flashing slowly. This means your heating system’s blower motor possibly isn’t working. This part moves warm air from the furnace into your space. We can assist in determining what’s causing a problem with this piece.
  5. One light is blinking slowly and the other is blinking quickly. This indicates your heating system might have not enough voltage or a short circuit. Reach out to our technicians at 209-257-3156 for support.
  6. One light is blinking on, on and off while the other flashes on, off, on. This indicates there may be a problem with your heating system’s control panel or wiring. Tokay Heating and Air Conditioning can find the error and take care of it.
  7. The duo of lights are using every other slow flickers. This indicates your HVAC equipment likely has a flame issue. There could be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 209-257-3156 for assistance.
  8. A single light blinks slowly while the other stays steady. This often signifies your HVAC system’s limit switch is experiencing an error. The switch prevents your heater from overheating. Get in touch with the professionals at Tokay Heating and Air Conditioning for support.

Heating System Blower Operates But No Warmth

Here’s what could be at fault when you notice your heater’s blower fan on, but you aren’t gaining any warm air.

  • The duo of lights are showing every other quick flickers. This means your furnace ignitor may not be in working order. This part kindles fuel in your furnace to create warm air and should be repaired by an expert from Tokay Heating and Air Conditioning.

Trust Us for Expert Furnace Repair

When you have to have your furnace in working order quickly, turn to the specialists at Tokay Heating and Air Conditioning. Our pros will fix the fault quickly and have your space feeling relaxing again in a short time. Call us at 209-257-3156 or contact us online to schedule an appointment today.

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