OEM Lennox Gas Valve — 24W66

The genuine OEM Lennox 24W66 gas valve controls and regulates the flow of natural gas or propane to the burners in your Lennox furnace. Working in concert with the ignition control and pressure switches, it opens to admit fuel during a heat call and closes to shut off gas safely, ensuring proper burner operation and rated heating capacity. This valve is engineered to Lennox factory specifications for a precise fit and dependable performance.

When a gas valve begins to fail, you may notice a furnace that ignites intermittently, fails to light at all, produces weak or uneven flames, or short-cycles on the heat call. A stuck or leaking valve can also trigger safety lockouts and no-heat conditions during the coldest weather.

Because the gas valve is a safety-critical component, OEM matters. The Lennox 24W66 is calibrated to the exact gas pressures and electrical specifications your furnace's control board expects, so it seats correctly, maintains proper manifold pressure, and preserves the safety interlocks Lennox designed into the system. Aftermarket substitutes can misregulate pressure or fail to integrate with the control sequence, risking nuisance faults or unsafe operation.