OEM Lennox Draft Inducer Blower Motor — 15B45

The genuine OEM Lennox 15B45 draft inducer blower motor drives the inducer fan that pulls combustion gases through the heat exchanger and safely out the flue on your Lennox furnace. By establishing proper draft before the burners fire, it satisfies the pressure switch and is essential to both safe operation and efficient combustion.

A failing inducer motor typically shows up as a furnace that won't ignite, a pressure switch that never closes, or lockout error codes on the control board. Listen for rattling, grinding, or loud humming at startup, and watch for a motor that runs hot, cycles on and off, or has seized bearings. Because this component is tied directly to combustion safety, a weak or dead inducer will prevent the furnace from lighting at all.

OEM is critical here: the 15B45 is engineered to Lennox's exact airflow, speed, and mounting specifications so it generates the correct draft to satisfy the pressure switch and vent flue gases safely. A generic substitute risks improper venting, nuisance lockouts, and carbon monoxide hazards. This direct factory replacement restores safe, reliable heating and protects your equipment's warranty.