A direct-replacement draft inducer motor built to restore proper combustion airflow in Lennox and Fasco furnaces. This shaded pole, single-phase motor matches the original electrical and mechanical specs of more than a dozen OEM part numbers, so there is no guesswork on fitment and no modification on installation.
The draft inducer blower is one of the first components to run during a furnace heating cycle. It pulls combustion gases through the heat exchanger and out the flue before the burners ignite, and it keeps that airflow steady throughout the cycle. When the inducer motor wears out -- common symptoms include loud rattling, failure to start, or a pressure switch lockout -- the furnace will not fire. This Fasco A164 motor gets the system running again with a part engineered to the same ratings as the original.
Sold under Fasco part number A164 and also catalogued as NBK Parts 12165, this motor cross-references directly to a broad list of Fasco 7021-series, Emerson, and Lennox part numbers. If your furnace uses any of the OEM numbers listed in the compatibility table, this is the correct replacement.
Shaded pole construction provides simple, brush-free operation with no start capacitor required -- a direct swap for the original motor type used in these furnace assemblies.
Integrated thermal overload protector shuts the motor down if winding temperature exceeds safe limits, protecting the furnace control board and heat exchanger.
Class B insulation rating (up to 266 deg F / 130 deg C winding temperature) ensures long-term durability in the high-ambient environment of a furnace cabinet.
6-inch leads with a pre-installed socket terminal connector match the OEM harness, allowing direct plug-in without splicing or additional connectors.
This motor is engineered to match the physical footprint and electrical specs of the original Fasco and Lennox inducer assemblies listed below. No adapters, no shimming, no wiring changes needed when replacing a listed part number.
The A164 is the inducer motor used in a range of Lennox gas furnace models that rely on a 3.3-inch diameter, 3000 RPM, 115V inducer assembly. If your furnace is currently running one of the OEM part numbers in the replacement list, this motor is the correct service part. Lennox part numbers 46K4101 and 67M5401 are among the most commonly searched service replacements this motor covers.