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

Its control board has double LED lights that can display a fault code. Depending on the fault, your heating system could display steady or flashing lights.

Though there are some elementary HVAC adjustments you can take care of without an expert, most fixes are best taken care of by HVAC technicians. When your furnace will not turn on or give heated air, call Bell Mechanical Services at 888-863-0560 for experienced furnace repair in McKinney and Frisco.

Our specialists will quickly discover and handle the malfunction, even if you don’t use a Lennox heating system. We can fix whichever kinds or models—and get the comfort reintroduced to your residence quickly.

What Does the Flickering Light on My Heater Mean?

Your heater relies on lights to flash code when it isn’t working right. It also uses this system to let you know it’s working properly.

Regular operation consists of:

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

If you see a single light flashing slowly and the other going on and off rapidly, your furnace could be experiencing a low flame signal. This can occur even when your heating system is running like it should. It means the flame sensing rod may need to be cleaned or in the wrong area on the burner. Contact us at 888-863-0560 for support.

Here are some of the most typical issues for Lennox heating systems.

Heater Refuses to Turn On

Here are some of the light sequences you might see when your heater refuses to or keep running. Most of these errors must be fixed by a technician, such as one from Bell Mechanical Services.

  1. Both LED lights aren’t lit. This signifies your heater might not have electricity. Look at the breaker box to make sure the heater fuse is not triggered. Attempt to reset the fuse if it is in the “off” area. If it immediately trips after a subsequent reset, don’t touch the breaker and contact us at 888-863-0560.
  2. One light is continuous and the other is flashing slowly. This signifies the flame rollout switch is likely not working right. The part is a critical safety device that helps in avoiding fires and carbon monoxide. You shouldn’t try to take care of this problem without professional help.
  3. An individual light is flickering rapidly and the other is blinking slowly. This often signifies power polarity has been reversed. Your heater could have a wiring fault that calls for professional support from Bell Mechanical Services.
  4. The pair of lights are blinking slowly. This means your heater’s blower motor likely isn’t working. This piece moves hot air from the furnace into your rooms. We can aid in pinpointing what’s causing a problem with this part.
  5. An individual light is blinking slowly and the other is blinking quickly. This signifies your heater may have not enough voltage or a short circuit. Contact our technicians at 888-863-0560 for help.
  6. One light is blinking on, on, off while the other flickers on, off, on. This indicates there might be a fault with your HVAC system’s control panel or wiring. Bell Mechanical Services can pinpoint the fault and fix it.
  7. The pair of lights display every other slow flashes. This signifies your heating system likely has a flame failure. There might be an issue with its gas supply, gas valve or ignitor control. Contact us at 888-863-0560 for assistance.
  8. A single light flickers slowly while the other stays steady. This often indicates your heating system’s limit switch is experiencing an error. The switch keeps your heater from becoming too warm. Call the specialists at Bell Mechanical Services for support.

Furnace Blower Operates But No Warm Air

Here’s what may be wrong when you hear your heating equipment’s blower fan on, but you aren’t gaining any heated air.

  • The pair of lights are giving alternate quick blinks. This means your furnace ignitor might be broken. This part lights energy in your HVAC equipment to create warmth and should be repaired by a specialist from Bell Mechanical Services.

Depend on Us for Skilled Furnace Repair

When you have to get your HVAC equipment in working order fast, turn to the experts at Bell Mechanical Services. Our pros will fix the issue right away and have your house feeling relaxing again in a short time. Get in touch with us at 888-863-0560 or contact us online to schedule an appointment right away.