While your Lennox® heater cannot talk to you, it possesses a process to get your attention when there’s a furnace error.

Its control panel has twin LED lights that can show a fault code. Based on the problem, your furnace may display solid or flashing lights.

While there are some simple HVAC fixes you can do on your own, most services are best left to HVAC technicians. When your heating system refuses to kick on or give warmth, call Mechanical Air Systems Co at 641-243-4654 for expert furnace repair in Mason City.

Our experts will speedily identify and fix the malfunction, even if you don’t have a Lennox heating system. We can service any brands or configuration—and get the warmth reintroduced to your home fast.

What Does the Flickering Light on My Furnace Mean?

Your heater relies on lights to flash code when it isn’t working right. It also uses this setup to tell you it’s operating like it should.

Correct function consists of:

  • Simultaneous slow flash—heater operating properly.
  • Concurrent fast flash—heating system is initiating the call for heat.

If you notice a single light blinking slowly and the other going on and off rapidly, your heater might be having a low flame signal. This can occur even when your furnace is heating like it should. It signifies the flame sensing rod may need to be cleaned or in the bad area on the burner. Call us at 641-243-4654 for help.

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

Furnace Refuses to Start

Here are a few of the light arrangements you might observe when your furnace refuses to or keep heating. The bulk of these problems have to be taken care of by a professional, such as one from Mechanical Air Systems Co.

  1. All LED lights are off. This indicates your HVAC system might not have electricity. Look at the breaker box to confirm the furnace fuse hasn’t triggered. Try resetting the fuse if it’s in the “off” spot. If it instantly trips after a subsequent reset, don’t try to reset it again and contact us at 641-243-4654.
  2. One light is unchanging and the other is flashing slowly. This implies the flame rollout switch is may be not working right. The switch is a critical safety mechanism that aids in stopping fires and carbon monoxide. You shouldn’t attempt to repair this fault without professional help.
  3. An individual light is blinking quickly and the other is flashing slowly. This often signifies power polarity has been transposed. Your heating system could have a wiring issue that needs expert assistance from Mechanical Air Systems Co.
  4. All lights are flashing slowly. This means your heating system’s blower motor probably isn’t running. This component sends heated air from the heater into your rooms. We can aid in pinpointing what’s causing a problem with this piece.
  5. An individual light is flashing slowly and the other is blinking rapidly. This indicates your heating system may have not enough voltage or a short circuit. Call our experts at 641-243-4654 for support.
  6. One light is flashing on, on, off while the other flashes on, off, on. This signifies there could be a malfunction with your heating system’s control panel or wiring. Mechanical Air Systems Co can determine the issue and handle it.
  7. The pair of lights show alternate slow blinks. This indicates your HVAC system may have a flame failure. There may be an issue with its gas supply, gas valve or ignitor control. Reach out to us at 641-243-4654 for support.
  8. An individual light flashes slowly while the other remains solid. This often means your heating system’s limit switch is not working. The switch keeps your HVAC equipment from becoming too warm. Reach out to the specialists at Mechanical Air Systems Co for help.

Heater Blower Works But No Heat

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

  • Both lights display alternate rapid flashes. This signifies your furnace ignitor may not be in working order. This component lights fuel in your heater to produce warm air and should be serviced by a technician from Mechanical Air Systems Co.

Trust Us for Professional Furnace Repair

When you have to get your HVAC equipment repaired without delay, turn to the technicians at Mechanical Air Systems Co. Our techs will fix the issue right away and have your house feeling cozy again in no time. Get in touch with us at 641-243-4654 or contact us online to request an appointment right away.