OEM Lennox Gas Valve — 99K65

The genuine OEM Lennox 99K65 gas valve regulates the flow of natural gas or propane into your furnace's burner assembly, working in concert with the ignition control to deliver safe, metered fuel every heating cycle. It is engineered to the exact pressure and voltage specifications of Lennox furnaces, ensuring precise burner operation and consistent temperature rise across your system.

When a gas valve fails, homeowners typically notice a furnace that ignites intermittently or not at all, a burner that fails to stay lit, unusual clicking without a flame, or a complete loss of heat. Because the valve is a safety-critical component, worn internal solenoids or a stuck regulator should never be bypassed or field-repaired.

Choosing the OEM 99K65 matters because aftermarket valves can have mismatched pressure ratings, incompatible wiring terminals, or improper manifold threading that compromise both efficiency and safety. This factory-authorized part guarantees a direct fit, correct gas pressure regulation, and full compatibility with your Lennox control board — restoring dependable, code-compliant heating performance.