OEM Lennox Gas Valve — 85K35

The genuine OEM Lennox 85K35 gas valve regulates the flow of natural or LP gas to the burners in your Lennox furnace, opening and closing on command from the control board to deliver safe, precise ignition and steady heat output. As a factory-matched replacement, it maintains the exact pressure regulation and safety response your furnace was engineered around.

Common signs of a failing gas valve include a furnace that ignites intermittently or not at all, no gas flow to the burners, weak or inconsistent flames, clicking without ignition, or the system locking out on a safety fault. Because the valve is a critical safety component, any hesitation or failure should be addressed promptly.

Installing the OEM Lennox 85K35 is essential for both safety and performance. Aftermarket valves may not match Lennox's precise pressure and voltage specifications, risking improper combustion, gas leaks, or nuisance lockouts. This factory part ensures correct fit, reliable operation, and continued compliance with your equipment's safety design and warranty requirements.