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The genuine OEM Lennox 96P01 hot surface ignitor (HSI) is the component that lights the burners in your Lennox gas furnace. When the thermostat calls for heat, the control board energizes the ignitor, which glows red-hot to ignite the gas as the valve opens. As the most frequently replaced ignition part in a furnace, a reliable HSI is essential for consistent, on-demand heat throughout the season.
Common failure symptoms: The furnace blower runs but produces no heat, you hear repeated clicking without ignition, the unit locks out after several failed attempts, or the ignitor no longer glows. Hot surface ignitors are brittle and can crack from thermal cycling, vibration, or contamination from oils on the element.
Why OEM matters: The OEM Lennox 96P01 is built to the exact resistance, voltage, and mounting specifications your furnace's control board expects. Universal ignitors can draw the wrong current, warp the mounting bracket, or shorten cycle life. Genuine Lennox parts guarantee correct fit, proper warm-up timing, and dependable ignition.