Lennox 21L91 Motor

If you are looking for a reliable 4-speed replacement for Lennox air handling units, the Lennox 21L91 blower motor is the specified OEM component for the job. This 1/4 HP 115V blower motor operates at a nominal 1075 RPM and utilizes a permanent split capacitor (PSC) design to maintain high electrical efficiency during continuous duty. Engineered as a Lennox 21L9101 direct replacement, this motor features a 48Y frame size, a standard 1/2-inch x 2.2-inch shaft, and a counterclockwise (CCW) rotation from the lead end. This multi-speed HVAC motor is specifically housed in a durable steel casing with sleeve bearings, making it ideal for residential furnace and air handler applications where quiet operation is required. For a complete installation, ensure you use a 5 MFD 370V capacitor to prevent premature failure. Whether you are cross-referencing old part numbers like 97H57 or 67F14, this motor provides the exact 115-volt single-phase performance needed to restore original system airflow and static pressure specifications.

• Multi-Speed Flexibility: Features four distinct speed taps to fine-tune airflow for various heating and cooling demands.
• Direct OEM Fit: Drop-in replacement for Lennox 21L91 and 21L9101, fitting popular 80MGF and 78UGF furnace models.
• PSC Efficiency: Permanent Split Capacitor design reduces amperage draw compared to shaded-pole alternatives.
• Robust Construction: Thermal protection and a 48-frame steel housing provide long-term durability in high-static environments.

What capacitor does the Lennox 21L91 motor require?
This motor requires a 5 MFD 370 VAC run capacitor for proper torque and efficiency.

Can I use this to replace a 3-speed motor?
Yes, provided the voltage, horsepower, and rotation match. You can simply cap off the unused speed lead during installation.

Which direction does this motor rotate?
The 21L91 is a CCWLE (Counterclockwise Lead End) motor. Always verify your existing blower wheel rotation before mounting.

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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.