Lennox 33H45 Motor

The Lennox 33H45 is a high-performance direct drive blower motor designed for precise airflow management in residential and commercial air handlers and gas furnaces. This 115V HVAC motor features a robust 3/4 HP output and a 1060 RPM base speed, optimized for consistent torque and static pressure handling. As a 4-speed furnace motor, it allows for granular adjustment of heating and cooling stages, ensuring the blower assembly operates at peak efficiency. Built on a standard 48Y frame with a 1/2" x 3" shaft, this PSC motor uses a 12.5 MFD at 370 VAC run capacitor to maintain low amperage draw and thermal stability.

For service technicians, the 33H45 is a drop-in OEM replacement motor that replaces several legacy part numbers, including 35K62, 86H47, and R47466-001. Its open-air-over (OAO) enclosure and self-aligning ball bearings provide continuous duty performance in demanding environments. This motor is typically mounted via a belly band configuration and is engineered for counterclockwise lead-end (CCWLE) rotation. Utilizing a genuine Lennox 33H45 blower motor ensures internal electrical components are matched to factory specifications, preventing the vibration and premature failure often associated with generic alternatives.

• Multi-Speed Versatility: 4-speed taps allow for precise airflow balancing across different ductwork configurations.
• High-Torque Performance: 3/4 HP rating provides the power necessary for larger blower wheels and high-static systems.
• Thermal Protection: Internal overload protection prevents winding burnout during heavy duty cycles.
• Precision Engineering: 1060 RPM speed is factory-tuned to minimize harmonic noise and cabinet vibration.

What capacitor does the Lennox 33H45 require?
This motor requires a 12.5 MFD / 370 VAC run capacitor for proper start-up and running efficiency.

Can I use this to replace a 1/2 HP motor?
While the 3/4 HP rating offers more power, it is critical to verify the physical frame size and ensure the current draw (12.4 Amps) does not exceed your system's circuit capacity.

Does this motor include the mounting bracket?
This is a belly-band mount motor; existing brackets or a new universal belly band must be used for installation.

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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.