The New Century 9724 (also sold as NBK Parts 20223) is a direct-replacement condenser fan motor engineered for residential and light commercial HVAC systems made by GE, Trane, and other major OEMs. With a permanently split capacitor design, automatic thermal overload protection, and heavy-duty ball bearings, it delivers long service life in outdoor condenser environments. The 5" diameter frame and extended stud mounting make it a bolt-in fit for a wide range of original applications.
HVAC condenser fan motors take a beating -- running in direct sun, high ambient heat, and year-round weather cycles. The New Century 9724 is built to OEM specification with a Totally Enclosed Air Over (TEAO) housing that keeps moisture, insects, and debris out of the windings. Class B insulation handles continuous duty in ambient temperatures up to 140 deg F (60 deg C), making it well-suited for rooftop and outdoor condenser unit service.
The motor ships with 36-inch leads, giving plenty of wire length for most condenser cabinet wiring harnesses without splicing. The 1/2-inch diameter shaft with a machined flat accepts standard condenser fan blade hubs. Shaft extension of 3 inches accommodates typical blade mounting depth.
PSC design provides smooth, efficient starting and running without a start capacitor. Requires a run capacitor matched to the motor rating.
Built-in thermal overload protector trips if winding temperature exceeds safe limits, protecting the motor from burnout during fault conditions.
TEAO enclosure seals windings from outdoor exposure. Designed for condenser fan service where airflow from the blade provides external cooling.
Precision ball bearings support continuous duty rotation and handle both vertical and horizontal shaft orientations with long service intervals.
The 9724 is rated for multi-horsepower operation at 1/4, 1/5, and 1/6 HP, allowing a single motor SKU to cover several OEM positions that may differ by nameplate HP. Always verify the replacement motor meets or exceeds the original unit's HP and current draw requirements before installation.
The 9724 uses extended stud mounting -- the same pattern found on many GE and Trane condenser fan assemblies. The 5.17-inch frame length and 7.5-inch overall length are typical of the 48-frame condenser motor class. Before ordering, measure your existing motor's frame length, shaft diameter, and stud pattern to confirm fitment.
As a permanent split capacitor (PSC) motor, the 9724 requires an external run capacitor. The correct capacitor MFD rating is specified on the original motor nameplate or OEM documentation for your unit. The run capacitor is not included with this motor. If you are replacing a failed motor, inspect the existing run capacitor for bulging or leakage and replace it if in doubt -- a faulty capacitor is a common cause of motor failure.
The New Century 9724 is a cross-reference replacement for a variety of GE, Trane, and other OEM condenser fan motors. Common cross-reference part numbers include motors previously sold under the GE 5KCP39BGY condenser fan motor family and related Trane service parts. Verify your unit's motor nameplate HP, RPM, voltage, frame size, shaft diameter, and mounting style before purchasing.