While your Lennox® heater can’t talk to you, it possesses a procedure to communicate a furnace error.

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

Although there are certain basic furnace adjustments you can complete yourself, most repairs are best taken care of by experts. When your furnace won’t start or give heated air, call Precision Mechanical at 605-206-3766 for experienced furnace repair in Rapid City.

Our experts will quickly identify and take care of the problem, even if you don’t use a Lennox heating system. We can repair all kinds or makes—and get the comfort returned to your home without delay.

What Does the Flashing Light on My Heating System Mean?

Your heating system depends on lights to flash code when it is malfunctioning. It also engages this setup to relay it’s working correctly.

Correct function includes:

  • Simultaneous slow flash—heating system working correctly.
  • Both lights flash fast—furnace is beginning to call for heat.

If you see a solitary light blinking slowly and the other flashing quickly, your heater could be having a low flame signal. This can take place even when your heater is operating like it should. It means the flame sensing rod might have buildup or in the wrong spot on the burner. Call us at 605-206-3766 for assistance.

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

Furnace Won’t Start

Here are some of the light patterns you could observe when your heating system will not or keep operating. The majority of these issues must be handled by an expert, for instance from Precision Mechanical.

  1. Both LED lights are extinguished. This means your heater might not be receiving power. Go to the breaker box to confirm the heater fuse isn’t triggered. You should reset the fuse if it is in the “off” position. If it immediately flips following a reset, don’t touch the breaker and contact us at 605-206-3766.
  2. A single light is stable and the other is blinking slowly. This implies the flame rollout switch is may be malfunctioning. The component is an essential safety mechanism that helps in stopping fires and carbon monoxide. You shouldn’t attempt to take care of this fault yourself.
  3. One light is flashing fast and the other is blinking slowly. This typically indicates power polarity has been reversed. Your heating system might have a wiring issue that requires specialized support from Precision Mechanical.
  4. The duo of lights are flashing slowly. This means your heater’s blower motor probably isn’t working. This piece circulates warm air from the HVAC system into your residence. We can help in figuring out what’s wrong with this part.
  5. One light is flashing slowly and the other is blinking rapidly. This signifies your heater may have low voltage or a short circuit. Get in touch with our technicians at 605-206-3766 for support.
  6. One light is blinking on, on, off while the other blinks on, off, on. This indicates there may be a fault with your heating system’s control board or wiring. Precision Mechanical can locate the fault and repair it.
  7. Both lights display alternate slow flashes. This indicates your heater possibly has a flame problem. There might be an issue with its gas supply, gas valve or ignitor control. Contact us at 605-206-3766 for assistance.
  8. A single light flashes slowly while the other is solid. This typically indicates your heating system’s limit switch is not working. The switch stops your HVAC equipment from getting too hot. Get in touch with the pros at Precision Mechanical for support.

Heater Blower Runs But No Heat

Here’s what might be broken when you notice your heater’s blower fan running, but you aren’t getting any warmth.

  • The pair of lights are showing alternate rapid flickers. This means your furnace ignitor may be broken. This piece kindles fuel in your heating system to produce warmth and should be repaired by a technician from Precision Mechanical.

Depend on Us for Professional Furnace Repair

When you have to get your heater in working order without delay, trust the specialists at Precision Mechanical. Our pros will take care of the error right away and have your space feeling cozy again in no time. Contact us at 605-206-3766 or contact us online to request an appointment today.