OEM Lennox Gas Valve — 30W47

The genuine OEM Lennox 30W47 gas valve regulates the flow of natural gas or propane to the burners in your Lennox furnace, opening and closing on command from the ignition control to safely deliver fuel during each heating cycle. It maintains proper manifold pressure and includes the safety shutoff logic that prevents gas from flowing unless ignition conditions are met, making it one of the most important components in the heating system.

Symptoms of a failing 30W47 include a furnace that ignites intermittently or not at all, burners that fail to light despite a working igniter, a clicking valve that won't open, weak or inconsistent flames, or a gas smell indicating the valve isn't sealing properly. A worn valve can also cause short cycling and inadequate heat output.

OEM matters for gas valves more than almost any other part because pressure regulation, thread fittings, and electrical control specifications must match your furnace exactly for safe combustion. An incorrect valve can create dangerous over- or under-firing conditions. The factory Lennox 30W47 guarantees correct pressure calibration, fitment, and safety compliance. Installation should always be performed by a licensed HVAC technician.