OEM Lennox Blower/Fan Motor — 25G21

The genuine OEM Lennox 25G21 fan motor drives the blower assembly that circulates conditioned air through your Lennox furnace, air handler, or fan coil. Built to the exact specifications of your original equipment, it delivers the correct RPM, torque, and airflow your system was engineered to move — keeping temperatures even and static pressure in range.

A failing blower motor shows itself in familiar ways: weak or no airflow from the registers, unusual humming or grinding noises, a motor that runs hot and cycles on thermal overload, or a unit that trips the breaker on startup. Once bearings wear or the windings degrade, comfort and efficiency drop quickly.

Choosing OEM matters on Lennox equipment because the control board, blower wheel, and airflow tables are all matched to factory motor specs. A generic substitute can pull the wrong amperage, spin the wrong speed, or fail to seat correctly in the housing — leading to nuisance faults and reduced service life. The 25G21 restores rated performance and preserves your system's efficiency and warranty compliance.