OEM Lennox Draft Inducer Motor Assembly w/ Capacitor — 57M85

The genuine OEM Lennox 57M85 draft inducer motor assembly, supplied complete with its run capacitor, drives the combustion-venting blower in your Lennox gas furnace. On each call for heat it pulls air through the heat exchanger and pushes exhaust gases safely out the flue, creating the negative pressure the pressure switch needs to prove venting before the burners ignite. It is essential to both efficient combustion and safe operation.

Common failure symptoms: The furnace won't start and locks out on a pressure-switch fault, you hear humming, grinding, or rattling from the inducer, the motor is slow to spin up, or bearings squeal on startup. A weak or failed capacitor often prevents the motor from reaching speed, mimicking a bad inducer.

Why OEM matters: The Lennox 57M85 assembly is matched to the correct airflow, housing, and electrical specification your furnace requires, and it arrives with the properly rated capacitor so you replace both wear items at once. Generic inducers can move the wrong volume of air and trip the pressure switch or degrade efficiency. The factory assembly ensures a precise fit and reliable, code-compliant venting for your Lennox equipment.