OEM Lennox Draft Inducer Blower Motor — Y4646

The genuine OEM Lennox Y4646 draft inducer blower motor drives the combustion venter blower that pulls flue gases through the heat exchanger and pushes them safely out the vent. Sequenced by the furnace control board before ignition, it establishes proper draft, closes the pressure switch, and allows the burners to fire — making it essential to both efficient and safe furnace operation on compatible Lennox models.

Common symptoms of a failing inducer motor include a furnace that won't start, a loud humming or buzzing at startup, grinding or squealing bearings, an open pressure switch fault code, or lockout after several failed ignition attempts. A seized or weak motor prevents the pressure switch from proving draft, so the board never releases gas to the burners, leaving you with no heat.

Installing the OEM Y4646 motor matters because Lennox matches the inducer's airflow, RPM, and mounting to each furnace's venting and pressure-switch setpoints. An underpowered aftermarket motor can cause nuisance lockouts, poor combustion, or unsafe venting. This direct factory replacement restores correct draft and reliable ignition while protecting your Lennox warranty.