The Century 799 (166186M, DE3E243N) Fan/Blower Motor is a dependable PSC (Permanent Split Capacitor) motor designed for multi-speed HVAC fan and blower applications. Operating at 1000 RPM, this 5-speed, single-shaft motor runs on 115V, 60Hz and features a 5" diameter (42 Frame) for easy installation and reliable airflow performance. Built with automatic thermal protection, continuous air-over design, and sleeve bearings, it provides smooth, quiet operation and long-lasting durability in residential and commercial air handling systems. Key Features Genuine Century OEM fan/blower motor for HVAC systems 1/2" diameter flatted shaft for secure and easy mounting 5-speed operation for adjustable airflow performance 1000 RPM, 115V, 60Hz single-phase for consistent, efficient operation Permanent Split Capacitor (PSC) design for quiet and energy-efficient use Automatic thermal protector prevents overheating and extends motor life Continuous air-over rating ensures reliability in demanding applications Open construction (OAO) for effective cooling Sleeve bearings for smooth, low-noise operation Compact 5" diameter (42 Frame) fits most standard HVAC housings Specifications Part Numbers: 799, 166186M, DE3E243N Brand: Century Type: Fan/Blower Motor (PSC) Voltage: 115V AC Speed: 1000 RPM Speeds: 5-speed operation Frequency: 60Hz Phase: Single-phase Frame Size: 42 Frame (5" diameter) Shaft: 1/2" diameter, flatted end Bearings: Sleeve Rotation: Reversible (CW/CCW) Enclosure: Open Air Over (OAO) Duty: Continuous Air Over Thermal Protection: Automatic Mounting Type: Resilient ring or belly band mount Compatible Applications: Ideal for HVAC blowers, fan coils, furnaces, and air handlers from leading manufacturers such as Carrier, Trane, Lennox, York, Goodman, and Rheem, requiring a 42 Frame, 115V, 1000 RPM multi-speed motor. Why Choose This Item Choose the Century 799 (166186M, DE3E243N) Fan/Blower Motor for versatile 5-speed performance, quiet and efficient operation, and proven OEM reliability. With its automatic protection, continuous-duty rating, and energy-efficient PSC design, it provides dependable airflow and long service life in both residential and commercial HVAC systems.