OEM Lennox Gas Valve — 83W12

The genuine OEM Lennox 83W12 gas valve regulates the flow of natural or LP gas to the burners in your Lennox furnace, opening on demand from the control board and modulating pressure to deliver clean, consistent combustion. As a critical safety component, it works in concert with the ignition system and pressure switches to ensure gas flows only when every safety condition is satisfied.

A failing gas valve often shows up as no heat, burners that fail to ignite or stay lit, delayed or rough ignition, a clicking valve that never opens, or a furnace that locks out on repeated failed ignition attempts. Internal solenoid failure, a stuck regulator, or gas odor near the valve are clear indicators the valve needs replacement.

Because the gas valve directly controls combustion, an OEM Lennox 83W12 is essential — it delivers the exact inlet/outlet pressure calibration, thread size, and electrical connections your furnace requires. Non-OEM valves risk improper gas pressure, unsafe operation, and warranty denial. Always install a factory replacement and have the valve commissioned by a qualified technician.