Furnace troubleshooting

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

While your Lennox® HVAC equipment cannot talk to you, it does have a procedure to tell you about a furnace error.

Its control panel has two LED lights that can share a fault code. Depending on the problem, your heating system may display steady or flashing lights.

While there are some elementary furnace adjustments you can complete yourself, the majority of tasks are best taken care of by the professionals. When your heater will not start or provide warm air, reach out to Four Seasons Air Conditioning and Heating LLC at 361-214-1203 for experienced furnace repair in Kingsville.

Our experts will speedily detect and take care of the issue, even if you don’t have a Lennox furnace. We can service whichever kinds or models—and get the comfort reintroduced to your house without delay.

REQUEST FURNACE REPAIR

What Does the Flashing Light on My Heater Mean?

Your furnace uses lights to flash code when it needs to be repaired. It also uses this setup to relay it’s running properly.

Normal heating consists of:

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

If you see a solitary light flashing slowly and the other flashing rapidly, your heating system could have a low flame signal. This can happen even when your heating system is working properly. It means the flame sensing rod may need to be cleaned or in the incorrect location on the burner. Contact us at 361-214-1203 for help.

Here are a few other of the most typical issues for Lennox heating systems.

Heating System Refuses to Kick On

Here are a few of the light arrangements you may notice when your furnace will not or keep heating. The majority of these errors must be handled by an expert, like one from Four Seasons Air Conditioning and Heating LLC.

  1. Both LED lights are off. This means your HVAC system might not have power. Find the breaker box to make sure the furnace fuse isn’t tripped. Try resetting the fuse if it is in the “off” spot. If it promptly turns off following a reset, don’t touch the breaker and get in touch with us us at 361-214-1203.
  2. An individual light is continuous and the other is flashing slowly. This shows the flame rollout switch is probably malfunctioning. The switch is a critical safety mechanism that assists in avoiding fires and carbon monoxide. You shouldn’t attempt to repair this fault on your own.
  3. A single light is flashing rapidly and the other is flashing slowly. This usually means power polarity has been transposed. Your heating system might have a wiring problem that calls for specialized help from Four Seasons Air Conditioning and Heating LLC.
  4. Both lights are flashing slowly. This means your heating system’s blower motor probably isn’t working. This part circulates hot air from the HVAC system into your rooms. We can help in figuring out what’s causing an issue with this part.
  5. An individual light is flashing slowly and the other is flashing fast. This signifies your HVAC system might have insufficient voltage or a short circuit. Contact our professionals at 361-214-1203 for assistance.
  6. One light is blinking on, on and off while the other flickers on, off, on. This indicates there could be a fault with your heating system’s control board or wiring. Four Seasons Air Conditioning and Heating LLC can pinpoint the issue and handle it.
  7. The duo of lights display alternate slow flashes. This signifies your heater possibly has a flame failure. There could be an issue with its gas supply, gas valve or ignitor control. Get in touch with us at 361-214-1203 for support.
  8. A single light flashes slowly while the other stays continuous. This typically indicates your HVAC equipment’s limit switch is open. The switch stops your furnace from overheating. Get in touch with the professionals at Four Seasons Air Conditioning and Heating LLC for assistance.

Furnace Blower Works But No Heat

Here’s what may be wrong when you notice your heating system’s blower fan working, but you aren’t getting any heat.

  • Both lights display every other fast blinks. This means your furnace ignitor may be broken. This part kindles gas in your heater to make warm air and should be repaired by a professional from Four Seasons Air Conditioning and Heating LLC.

Turn to Us for Skilled Furnace Repair

When you need to have your HVAC equipment fixed fast, depend on the experts at Four Seasons Air Conditioning and Heating LLC. Our techs will fix the error quickly and have your space feeling relaxing again in no time. Reach out to us at 361-214-1203 or contact us online to schedule an appointment right away.

Back To Blog