OEM Lennox Condenser Fan Motor — 25W18

The genuine OEM Lennox 25W18 fan motor drives the outdoor condenser fan on your Lennox cooling or heat pump system, pulling air across the coil so the unit can reject heat efficiently. Built to Lennox's exact electrical and mechanical specifications, it delivers the correct RPM, rotation, and shaft dimensions for a true drop-in fit — no adapters or guesswork required.

A failing fan motor rarely fails silently. Common symptoms include a condenser fan that hums but won't spin, blades that turn slowly or stall, overheating and repeated breaker trips, grinding or squealing bearings, and a system that short-cycles or stops cooling on hot days. Left unaddressed, a weak motor forces the compressor to run against high head pressure, risking far more expensive damage.

Choosing OEM matters on Lennox equipment. Aftermarket motors often differ in horsepower, capacitor rating, or bearing quality, which leads to poor airflow, premature failure, and voided warranties. The 25W18 is the factory-matched part, engineered for the run capacitor and airflow profile your unit was designed around, so you restore rated efficiency and quiet operation the first time.