OEM Lennox Draft Inducer Motor Assembly — 74W55

The genuine OEM Lennox 74W55 draft inducer motor assembly pulls combustion gases through the heat exchanger and safely vents them out of your furnace. It energizes at the start of every heating cycle, and the furnace pressure switch confirms proper airflow before the burners are allowed to ignite. This assembly is engineered to match the exact CFM, mounting, and electrical specifications of compatible Lennox furnaces.

When a draft inducer motor fails, you'll often notice loud rattling, humming, or grinding noises at startup, a furnace that clicks but never fires, or a unit that locks out on a pressure-switch fault code. Worn bearings, a seized wheel, or an open winding are the most common culprits, and a struggling motor can trigger repeated ignition lockouts that leave you without heat.

Choosing the OEM 74W55 ensures the blower wheel is correctly balanced and the motor delivers the precise draft your Lennox control board expects. Aftermarket substitutes can shift the pressure-switch reading out of range, causing nuisance lockouts or unsafe venting. A factory-matched part restores rated performance, protects your warranty, and keeps combustion safe and efficient.