OEM Lennox Noise Reduction Burner Assembly — 14C40

The Lennox 14C40 (factory number 612997-10) is a genuine OEM noise reduction burner assembly engineered for Lennox gas furnaces. This assembly delivers a controlled, stable flame while dampening the combustion roar that standard burners produce, keeping your heating system running quietly and efficiently. It is designed to mount precisely within the burner box and align with the furnace's gas manifold and igniter for clean, reliable ignition every cycle.

Common failure symptoms: A worn or damaged burner assembly often shows up as loud roaring or rumbling during ignition, delayed or rough light-off, uneven or yellow-tipped flames, soot buildup, or a furnace that short-cycles on the flame sensor. If you hear increased combustion noise or notice inconsistent heating, the burner assembly is a likely culprit.

Why OEM matters: The Lennox 14C40 is built to exact factory tolerances so flame geometry, gas metering, and noise-reduction baffling match your furnace's original engineering. Aftermarket substitutes can disrupt the air-fuel mixture, void warranty coverage, and reintroduce the very noise this part is designed to eliminate. Choosing the OEM 14C40 ensures proper fit, rated efficiency, and safe combustion.