OEM Lennox Gas Valve — 31L13

The genuine OEM Lennox 31L13 gas valve meters the supply of natural or LP gas to your Lennox furnace burners on every heating cycle. It responds to signals from the ignition control and safety chain, opening to feed the burners and shutting off gas flow the moment the call for heat ends or a safety condition is detected — a role that directly affects both comfort and safety.

Common failure symptoms: When the 31L13 begins to fail you may experience no heat, a furnace that ignites intermittently or not at all, burners that ignite then drop out, repeated ignition lockouts, or the smell of gas near the appliance. A valve that leaks or sticks can also cause rough, noisy ignition or short cycling.

Why OEM matters: This valve is factory-calibrated to a precise gas pressure and matched to your furnace's electrical connections and safety interlocks. Generic replacements can under- or over-fire the burners and compromise safe shutoff. The OEM 31L13 guarantees correct calibration, fit, and wiring compatibility with your Lennox furnace, protecting safe operation and warranty coverage. Always choose the genuine part for gas-carrying components.