OEM Lennox Draft Inducer Motor Assembly — 43J58

The genuine OEM Lennox 43J58 draft inducer motor assembly draws combustion byproducts through the heat exchanger and vents them out the flue, creating the draft your Lennox furnace requires to close its pressure switch and begin the ignition sequence. Delivered as a complete factory unit with the matched blower wheel and housing, it reproduces the original airflow, rotation, and mounting for a true drop-in installation.

Signs of a failing inducer include unusual humming, buzzing, or knocking noises at startup, a furnace that will not fire because the pressure switch stays open, or repeated ignition lockouts and no-heat calls. Over time bearings seize, wheels crack, and windings short, all of which weaken draft and trigger the furnace's safety controls.

Selecting the OEM 43J58 is important because Lennox flue and combustion systems are designed around a specific inducer performance curve; a generic motor can produce insufficient draft, cause pressure-switch nuisance trips, and jeopardize safe venting. This factory assembly restores correct draft, dependable ignition, and safe heating performance for your Lennox equipment.