Lennox 47F99 Motor

The Lennox 47F99 motor is a high-performance 1/6 HP condenser fan motor designed for direct-drive applications in residential and light commercial HVAC systems. Operating at 208/230 volts and a single-phase 60Hz frequency, this PSC motor (Permanent Split Capacitor) delivers a constant 1075 RPM to maintain optimal airflow across the condenser coils. Built with a 48Y frame and a 1/2-inch diameter shaft, it serves as a reliable replacement for cooling units and heat pumps requiring precise thermal regulation. The CCWLE rotation (Counterclockwise Lead End) and sleeve bearing design contribute to quieter operation and consistent mechanical stability under continuous duty cycles.

For contractors performing field service, this motor is a drop-in replacement for several older HVAC part numbers, including 47F9901 and 25G77. It is compatible with a wide range of Lennox-family equipment, including brands like Armstrong, Ducane, and Allied Air. To ensure peak performance and prevent premature failure, it is recommended to pair this motor with a new 5 MFD / 370 VAC capacitor during installation.

• OEM Compatibility: Exact electrical match for Lennox HS18, HP18, and CHP15 series units, ensuring easy integration without mounting modifications.
• Efficient Thermal Protection: Internally protected against overheating to safeguard the windings during high-ambient summer operation.
• Technical Reliability: Features a 1.10 Amp rating and Class B insulation for long-term service in demanding condenser environments.
• Versatile Cross-Reference: Replaces multiple legacy part numbers, reducing inventory complexity for service technicians.

Common Questions

What is the correct capacitor for the Lennox 47F99?
This motor requires a 5 MFD at 370 VAC run capacitor. Using an old or improperly rated capacitor can lead to overheating and reduced motor life.

Is this motor reversible?
No, this specific model is factory-set for CCWLE (Counterclockwise Lead End) rotation. Always verify the rotation requirements of your existing fan blade before installation.

Can this motor be used in 460V systems?
No, this motor is strictly rated for 208-230V single-phase power. Applying higher voltage will cause immediate failure and potential safety hazards.

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.