While your Lennox® heater can’t talk to you, it has a procedure to get your attention when there’s a furnace error.

Its motherboard has double LED lights that can share a fault code. Depending on the issue, your furnace could display continuous or flashing lights.

Though there are certain simple HVAC fixes you can complete on your own, many fixes are best taken care of by HVAC technicians. When your heating system will not kick on or deliver warmth, contact May's Heating & Air at 301-690-0397 for expert furnace repair in Frederick.

Our technicians will speedily detect and handle the issue, even if you don’t have a Lennox heating system. We can fix all kinds or configuration—and get the warmth returned to your home without delay.

What Does the Blinking Light on My Furnace Mean?

Your heater relies on lights to flash code when it isn’t working right. It also engages this system to tell you it’s working correctly.

Correct heating involves:

  • Simultaneous slow flash—heating system operating properly.
  • Both lights flash fast—heater is starting to call for heat.

If you realize that a solitary light flashing slowly and the other going on and off quickly, your heater may be having a low flame signal. This can take place even when your heater is operating properly. It signifies the flame sensing rod might need to be cleaned or in the bad area on the burner. Reach out to us at 301-690-0397 for assistance.

Here are several other of the most typical errors for Lennox heating systems.

Heating System Refuses to Start

Here are some of the light sequences you may observe when your heat won’t turn on or keep running. The majority of these issues have to be taken care of by a technician, like one from May's Heating & Air.

  1. The pair of LED lights are extinguished. This means your HVAC system might not have power. Look at the breaker box to make sure the furnace fuse isn’t tripped. You should reset the fuse if it’s in the “off” spot. If it instantly flips after you reset it, don’t try to reset it again and call us at 301-690-0397.
  2. An individual light is continuous and the other is flickering slowly. This shows the flame rollout switch is possibly not working right. The part is an essential safety tool that assists in stopping fires and carbon monoxide. You shouldn’t try to take care of this malfunction without professional help.
  3. A single light is blinking rapidly and the other is flickering slowly. This often indicates power polarity has been transposed. Your furnace could have a wiring error that needs expert support from May's Heating & Air.
  4. The pair of lights are blinking slowly. This indicates your heater’s blower motor likely isn’t working. This piece moves hot air from the heating system into your space. We can aid in figuring out what’s causing a problem with this piece.
  5. One light is flickering slowly and the other is flickering quickly. This signifies your heating system could have insufficient voltage or a short circuit. Get in touch with our specialists at 301-690-0397 for assistance.
  6. One light is flashing on, on, off while the other blinks on, off, on. This signifies there could be a malfunction with your HVAC system’s motherboard or wiring. May's Heating & Air can pinpoint the issue and fix it.
  7. Both lights display alternate slow flashes. This signifies your heater likely has a flame error. There might be trouble with its gas supply, gas valve or ignitor control. Get in touch with us at 301-690-0397 for support.
  8. A single light flashes slowly while the other remains steady. This often means your HVAC equipment’s limit switch is experiencing an error. The switch prevents your heating system from becoming too warm. Reach out to the specialists at May's Heating & Air for support.

Heating System Blower Works But No Warmth

Here’s what may be at fault when you observe your heater’s blower fan on, but you aren’t getting any heated air.

  • The duo of lights display alternate rapid blinks. This indicates your furnace ignitor may not be in working order. This component lights energy in your heating system to produce warm air and should be serviced by an expert from May's Heating & Air.

Turn to Us for Expert Furnace Repair

When you need to have your heater repaired without delay, depend on the specialists at May's Heating & Air. Our techs will repair the error quickly and have your residence feeling cozy again in a short time. Contact us at 301-690-0397 or contact us online to get an appointment right away.