Lennox 100483-20 Condenser Fan Motor – Genuine OEM 1/12 HP 208/230V 825 RPM 1PH

The Lennox 100483-20 (Catalog # 38W84) is a precision-engineered condenser fan motor, serving as the essential heat-rejection "engine" for your outdoor air conditioning or heat pump unit. This 1/12 HP motor is specifically designed for Lennox, Armstrong, and Ducane high-efficiency series, operating at a specialized 825 RPM to provide whisper-quiet operation while maintaining critical system head pressures. As a genuine OEM component, it ensures your outdoor coils are cleared of thermal energy efficiently, preventing compressor overheating and ensuring your furnace and A/C series run at factory-rated performance levels even during peak summer demand.

Key Features and Function:

• Acoustic Airflow Management: The low-speed 825 RPM calibration is specifically tuned for residential areas with strict noise ordinances, offering a significant decibel reduction compared to standard 1075 RPM motors.
• Genuine OEM Reliability/Fitment: Factory-authorized by Lennox to provide the exact torque and shaft length required for a "drop-in" installation, eliminating the need for mounting bracket modifications.
• Heavy-Duty Weatherproof Build: Features a "Totally Enclosed Air Over" (TEAO) enclosure and permanently lubricated bearings to resist rain, dust, and debris in harsh outdoor environments.
• Direct-Fit Design/Plug-and-Play: Includes factory-coded wiring leads and a standard 48-frame diameter (5-5/8") for seamless integration with the original fan shroud and electrical contactor.

Product Details and Key Specifications:

• Part Number: 100483-20 (Catalog # 38W84)
• Manufacturer: Lennox / ServiceFirst (Genuine OEM)
• Part Type: PSC Condenser Fan Motor
• Voltage: 208-230V
• HP / RPM: 1/12 HP @ 825 RPM
• Phase / Hertz: Single-phase (1PH) / 60 Hz
• Rotation: CWSE (Clockwise Shaft End)
• Frame Size: 48 Frame (5-5/8" Diameter)
• Capacitor Required: 5 MFD / 370V (Sold Separately)
• Shipping Weight: 9.2 lbs

🛠️ HVAC Depot Pro Tip: The "Water Slinger" Check

When installing the 100483-20 motor, ensure the rubber "water slinger" ring on the shaft is positioned about 1/4 inch away from the motor housing. This small component prevents rainwater from traveling down the shaft and entering the internal bearings. During your Diagnostic Check, always verify that the fan blade is not sitting too deep in the orifice; improper blade height can cause the motor to draw high amperage and trip its internal thermal overload. Always replace the 5 MFD capacitor at the same time to ensure the new motor starts with full torque.

Cross-Reference & Compatibility:

The 100483-20 is a direct OEM replacement for the following part numbers:

• OEM Numbers: 38W84, 100483-20, 10048320, 38W8401, LB-109033B
• Genteq / GE: 5KCP39BGS068S, 3231
• Aftermarket Cross: Fasco D7918, Mars 10452

Extensive Model Compatibility List:

Note: Use 'CTRL+F' to search for your specific model:

• Lennox XC / XP Series: XC13, XC14, XP13, XP14 (Low HP Configurations)
• Lennox Merit Series: 13ACX, 14ACX, 13HPX, 14HPX
• Armstrong / Ducane: 4AC13, 4AC14, 4HP13, 4HP14
• AirEase / Concord: 4AC13L, 4AC14L series units.