OEM Lennox Noise Reduction Burner Assembly — 14C37

The Lennox 14C37 (factory number 612997-04) is a genuine OEM noise reduction burner assembly built for compatible Lennox gas furnaces. Engineered to smooth the air-fuel mixture at the burner ports, this design minimizes the ignition "pop" and combustion roar common to standard burners while delivering a clean, stable flame across the heat exchanger.

Common failure symptoms: A worn or corroded burner assembly often announces itself with loud ignition thumps, flame rollout, delayed or uneven lighting, yellow or lazy flames, sooting, and nuisance lockouts. Rust, cracked burner tubes, or clogged ports can also cause incomplete combustion and inconsistent heating output.

Why OEM matters: The noise-reduction geometry of the 14C37 is precisely tuned to your furnace's gas orifice size, manifold pressure, and heat-exchanger flame path. Installing the exact Lennox part preserves the intended quiet operation, proper flame carryover between burners, and rated combustion efficiency. Generic burner assemblies can shift the flame pattern, defeat the noise-dampening design, and stress the heat exchanger — risks the factory component is built to avoid.