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The genuine OEM Lennox 71J96 draft inducer blower motor pulls combustion gases through the heat exchanger and pushes them out the flue at the start of every heating cycle. By establishing proper draft, it satisfies the pressure switch and allows safe ignition, making it essential to both furnace performance and safe venting of exhaust.
Common failure symptoms: loud humming, grinding, or rattling from the inducer housing, a motor that won't spin or spins slowly, a pressure-switch-open lockout, no ignition, or repeated no-heat calls. Worn bearings and failing capacitors are typical culprits.
Why OEM matters: the motor's speed, airflow, and housing dimensions are matched to your Lennox model's venting and pressure-switch set point. The OEM Lennox 71J96 delivers the exact draft your system was designed around, while aftermarket inducers can under- or over-draft, trip safeties, or fail to seat correctly against the flue and gasket.