OEM Lennox Draft Inducer Motor Assembly — 12W47

The genuine OEM Lennox 12W47 draft inducer motor assembly pulls combustion gases through the heat exchanger and pushes them out the flue, establishing the safe draft your furnace needs before ignition. This complete assembly includes the motor and blower housing engineered to your Lennox specifications, so it moves the exact volume of air required to close the pressure switch and support clean, efficient combustion.

Common failure symptoms: A failing 12W47 inducer often produces loud humming, grinding, or rattling noises at startup, or fails to spin up at all. Because the pressure switch depends on inducer airflow, a weak or seized motor commonly triggers ignition lockouts and pressure-switch fault codes. Worn bearings and a burned-out winding are the most frequent failure points.

Why OEM matters: Lennox designs each inducer assembly to deliver a precise airflow and RPM matched to the furnace's venting and safety controls. Aftermarket motors can move too little or too much air, causing pressure-switch faults or incomplete combustion. The OEM 12W47 ensures correct airflow, bolt pattern, and wiring for a reliable, code-compliant fit in your Lennox furnace.