For field technicians and mechanical contractors, the Lennox 72L08 Fan Motor (also identified as 20390806) is a critical OEM condenser fan motor designed for drop-in compatibility in residential and light commercial condensing units. This 1/5 HP motor operates on a 208-230V single-phase circuit at 1075 RPM, providing the consistent torque required for high-static outdoor environments. Built to a 42 frame specification with a 1/2 x 2-inch shaft, it replaces obsolete part numbers including the legacy 72L0801. As a Permanent Split Capacitor (PSC) design, it requires a 5 MFD / 370V capacitor for proper phase shifting and starting torque. Its CWLE (Clockwise Lead End) rotation and sleeve bearing construction ensure balanced airflow and reliable heat dissipation from the refrigerant coils, maintaining system head pressure within design parameters during peak summer loads. Key Benefits for Contractors: Direct OEM Matching: Perfectly replaces Lennox 72L0801 and 203908-06, eliminating the need for mounting bracket modifications in the field. Broad Compatibility: Engineered for use in multiple Allied, Armstrong, and Ducane equipment lines, including AFAIR and AFHEAT series. Thermally Protected: Features internal thermal overload protection to prevent winding burnout during high-ambient operating conditions. Efficient Heat Exchange: The 1075 RPM single-speed output is tuned to optimize CFM over condenser coils, preventing high-pressure trips. Common Questions: Is the Lennox 72L0801 different from the 72L08? No, these parts are technically identical and interchangeable; the 72L08 is the current catalog designation. Which capacitor should be installed with this motor? This motor is designed to work with a 5 MFD 370 VAC capacitor. Using an incorrectly rated capacitor can lead to overheating and premature winding failure. What is the rotation of this condenser motor? The rotation is Clockwise Lead End (CWLE). Always verify the fan blade pitch matches this rotation to ensure proper air draw through the unit. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
