OEM Lennox Gas Valve — 93M81

The genuine OEM Lennox 93M81 gas valve meters the flow of fuel to the burners and opens only when the control board and safety circuit confirm every condition for a safe light. As the heart of the combustion system, it regulates manifold pressure so your Lennox furnace delivers steady, efficient heat on every call from the thermostat.

Common failure symptoms: A bad 93M81 typically shows up as burners that won't ignite, a furnace that ignites then quickly shuts down, delayed or rough lighting, or a faint gas odor near the unit. You may also hear the valve clicking without gas actually flowing. Because this part directly controls fuel, any hesitation or irregular operation should be addressed promptly.

Why OEM matters: Gas valves are calibrated to exact pressure and voltage specifications, and Lennox matches the 93M81 to the furnace's ignition control, orifices, and heat exchanger. Substituting a generic valve risks incorrect manifold pressure, poor combustion, and voided safety listings. The factory 93M81 arrives pre-set for your model, ensuring correct fit, proper gas regulation, and full compliance with Lennox safety standards. Always have a qualified technician install and leak-test any gas valve.