Lennox 81G50 Blower Motor

The Lennox 81G50 Blower Motor is a high-performance direct drive blower motor engineered for heavy-duty air handler and furnace operations. As a veteran-grade OEM replacement motor, this 1/3 HP blower motor operates on a 208-230V, single-phase power supply at 60Hz. It features a versatile 3-speed motor configuration, allowing for precise airflow management to maintain system balance and efficiency. Rated at 825 RPM, this PSC motor is built with a 48Y frame and utilizes sleeve bearings for quiet, long-term reliability in horizontal mounting positions. The unit includes a 1/2-inch diameter shaft with a 2.5-inch length and requires a 20 MFD 370 VAC capacitor for proper startup and operation.

Key Benefits:

• Optimized Airflow Control: Multiple speed taps allow HVAC contractors to fine-tune CFM delivery based on high-static or low-load requirements.
• Broad Compatibility: A common Lennox replacement part for popular air handler series including CB19, B19, and high-efficiency gas furnaces.
• Robust Thermal Protection: Features internal thermal overload protection to prevent winding failure during demanding duty cycles.
• Direct OEM Fit: Replaces legacy part numbers 81G5001 and cross-references with 161R67, ensuring a drop-in installation without cabinet modifications.

Common Questions:

What are the symptoms of a failing Lennox 81G50 motor?
Technicians typically look for a seized blower wheel, humming sounds caused by a weak run capacitor, or intermittent operation due to the internal thermal protection tripping from high amperage draw.

Does this motor include the run capacitor?
This blower motor is sold as the motor assembly only. It requires a 20 MFD @ 370V capacitor; always replace the capacitor when installing a new motor to prevent premature PSC motor failure.

How do I verify the rotation for this unit?
This model is specified as CCWLE (Counter-Clockwise Lead End). Confirm your existing blower’s rotation before installation to ensure proper air movement through the evaporator coil.

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.