OEM Lennox Hot Surface Ignitor — 56W61

The genuine OEM Lennox 56W61 hot surface ignitor is the component that lights the burners in your Lennox gas furnace. When a heat call is received, the control board sends voltage to the ignitor, which glows red-hot and ignites the gas flowing across the burners. It is engineered to the exact resistance and heat profile Lennox control boards expect, ensuring consistent, on-demand ignition throughout the heating season.

Common failure symptoms: A failed 56W61 ignitor is one of the most frequent causes of no-heat calls. Watch for the furnace blower running without warm air, a system that locks out after several failed ignition attempts, or a visibly cracked, blistered, or non-glowing ignitor element. These silicon-carbide/nitride elements are brittle and degrade with normal thermal cycling.

Why OEM matters: Aftermarket universal ignitors often carry the wrong resistance or mounting geometry, leading to short cycling, delayed ignition, or premature burnout. The factory 56W61 guarantees the correct fit, electrical characteristics, and safe flame timing for your specific Lennox furnace — protecting both the ignitor and the control board it connects to.