While your Lennox® heater isn’t able to speak to you, it possesses a method to tell you about a furnace error.

Its motherboard has two LED lights that can share a fault code. Subject to the fault, your heater might show continuous or flashing lights.

Though there are some basic furnace adjustments you can complete without an expert, the majority of services are best handled by experts. When your heater refuses to kick on or give warmth, contact Precision Mechanical at 605-206-3766 for skilled furnace repair in Rapid City.

Our technicians will swiftly discover and repair the breakdown, even if you don’t have a Lennox heater. We can service all kinds or makes—and get the comfort returned to your house quickly.

What Does the Flickering Light on My Heater Mean?

Your heating system uses lights to flash code when it isn’t working right. It also engages these lights to let you know it’s working correctly.

Correct heating consists of:

  • Concurrent slow flash—furnace working properly.
  • Both lights flash fast—heating system is starting to call for heat.

If you see a single light going on and off slowly and the other flashing fast, your heating system may be having a low flame signal. This can happen even when your furnace is running properly. It signifies the flame sensing rod might be dirty or in the incorrect spot on the burner. Call us at 605-206-3766 for help.

Here are a few other of the most common problems for Lennox HVAC systems.

Furnace Refuses to Kick On

Here are some of the light sequences you may observe when your heating system will not or keep heating. The majority of these problems need to be fixed by a specialist, such as one from Precision Mechanical.

  1. The duo of LED lights aren’t lit. This indicates your heating system might not have electricity. Go to the breaker box to ensure the heater fuse is not triggered. Attempt to reset the fuse if it is in the “off” position. If it instantly trips after a subsequent reset, don’t touch the breaker and call us at 605-206-3766.
  2. One light is unchanging and the other is blinking slowly. This signifies the flame rollout switch is likely malfunctioning. The part is a critical safety guard that assists in avoiding fires and carbon monoxide. You shouldn’t seek to handle this issue without professional help.
  3. An individual light is flashing fast and the other is flashing slowly. This often signifies power polarity has been reversed. Your heating system might have a wiring error that calls for professional aid from Precision Mechanical.
  4. Both lights are flashing slowly. This signifies your heater’s blower motor likely isn’t operating. This piece distributes heated air from the furnace into your space. We can help in figuring out what’s causing an issue with this part.
  5. An individual light is flickering slowly and the other is flashing quickly. This indicates your heater might have insufficient voltage or a short circuit. Reach out to our specialists at 605-206-3766 for help.
  6. One light is flickering on, on, off while the other flashes on, off, on. This signifies there may be a fault with your heating system’s control panel or wiring. Precision Mechanical can pinpoint the problem and take care of it.
  7. The duo of lights are using alternating slow flickers. This means your heating system likely has a flame error. There could be a problem with its gas supply, gas valve or ignitor control. Call us at 605-206-3766 for assistance.
  8. An individual light flickers slowly while the other is steady. This usually means your HVAC equipment’s limit switch is malfunctioning. The switch keeps your heater from getting too hot. Call the experts at Precision Mechanical for support.

Furnace Blower Works But No Warmth

Here’s what could be wrong when you hear your heating system’s blower fan working, but you aren’t getting any heated air.

  • The pair of lights are showing alternate rapid flashes. This indicates your furnace ignitor may not be in working order. This component lights energy in your HVAC equipment to produce warm air and should be repaired by an expert from Precision Mechanical.

Trust Us for Skilled Furnace Repair

When you have to get your heater repaired without delay, depend on the experts at Precision Mechanical. Our pros will take care of the fault quickly and have your house feeling relaxing again soon. Reach out to us at 605-206-3766 or contact us online to get an appointment today.