While your Lennox® HVAC equipment can’t talk to you, it has a process to tell you about a furnace error.

Its control panel has two LED lights that can display a fault code. Subject to the issue, your heater could use continuous or flashing lights.

While there are some simple furnace fixes you can do yourself, many services are best handled by the professionals. When your heater won’t turn on or deliver heat, contact Diedrick's Heating and Air Conditioning at 920-833-7967 for expert furnace repair in Seymour.

Our experts will quickly identify and repair the issue, even if you don’t own a Lennox heater. We can service any types or configuration—and get the warmth reintroduced to your home quickly.

What Does the Flashing Light on My Heater Mean?

Your heating system depends on lights to flash code when it requires repairs. It also works this system to relay it’s operating correctly.

Correct operation consists of:

  • Concurrent slow flash—heater working like it should.
  • Simultaneous fast flash—heater is beginning to call for heat.

If you realize that a single light going on and off slowly and the other going on and off quickly, your heating system could be having a low flame signal. This can occur even when your heater is operating correctly. It means the flame sensing rod may have buildup or in the incorrect spot on the burner. Contact us at 920-833-7967 for assistance.

Here are several other of the most typical faults for Lennox heaters.

Furnace Will Not Kick On

Here are a few of the light patterns you might observe when your furnace will not or keep operating. The majority of these errors have to be taken care of by a specialist, for instance from Diedrick's Heating and Air Conditioning.

  1. Both LED lights aren’t lit. This signifies your heating system might not have electricity. Find the breaker box to make sure the heating system fuse is not flipped. Try resetting 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 920-833-7967.
  2. One light is unchanging and the other is blinking slowly. This signifies the flame rollout switch is possibly open. The part is an essential safety tool that aids in preventing fires and carbon monoxide. You shouldn’t seek to repair this fault on your own.
  3. One light is flashing rapidly and the other is flashing slowl