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The genuine OEM Lennox Y5405 gas valve regulates the flow of fuel to the burners in your Lennox furnace or heating appliance. It works in concert with the ignition control and safety circuits to open only when a call for heat is present and to shut off gas immediately when conditions are unsafe, making it one of the most critical safety components in your system.
Common signs of a failing gas valve include a furnace that will not ignite, burners that light intermittently or fail to stay lit, delayed ignition with a noticeable gas smell, or a system that locks out on repeated ignition failures. A valve that chatters, hums loudly, or leaks gas should be replaced without delay.
Choosing the OEM Lennox Y5405 ensures the valve is calibrated to the exact pressure and voltage specifications your Lennox equipment was engineered for. Aftermarket substitutes can deliver incorrect manifold pressure, void your warranty, and create safety risks. This factory part guarantees proper fit, rated performance, and dependable operation for years to come.