OEM Lennox Gas Valve — 93M80

The genuine OEM Lennox 93M80 gas valve controls the fuel supply to your furnace burners, opening precisely when the ignition control and safety circuit call for heat and holding manifold pressure steady throughout the cycle. This regulation is what gives your Lennox system clean, efficient combustion and consistent output.

Common failure symptoms: When the 93M80 fails, you may see burners that fail to ignite, a furnace that fires briefly then drops out, hard or delayed starts, weak flames, or a gas smell around the cabinet. A clicking valve with no fuel flow is another telltale sign of an internal fault. Any of these conditions warrants immediate service since fuel delivery is involved.

Why OEM matters: Lennox factory-calibrates the 93M80 to the exact manifold pressure, coil voltage, and inlet/outlet configuration your furnace requires. Aftermarket valves can supply the wrong pressure and cause sooting, short cycling, or unsafe operation while voiding the unit's safety certification. Choosing the OEM valve guarantees a drop-in fit and rated performance built specifically for your Lennox equipment. Installation and leak-testing should always be performed by a licensed HVAC technician.