Lennox 23C04 (Lennox 607421-29) is a genuine OEM ECM constant torque blower motor designed to deliver reliable, energy-efficient airflow performance in Lennox residential HVAC systems. This factory pre-programmed motor is engineered for direct replacement, helping restore proper airflow, comfort, and system efficiency without the need for additional programming or setup.
This 1/2 HP ECM blower motor operates on 115 VAC power and features a 5-speed constant torque design with an operating range of 0 to 1100 RPM. ECM (Electronically Commutated Motor) technology provides consistent airflow across varying system conditions while consuming less energy compared to traditional PSC motors. The result is improved comfort, quieter operation, and reduced electrical consumption.
The Lennox 607421-29 blower motor is commonly used in Lennox furnaces and air handlers where dependable airflow control and OEM compatibility are critical. As a genuine Lennox replacement part, it meets original factory specifications for fit, performance, and long-term durability, making it an ideal solution for professional HVAC repairs or preventive maintenance.
Key features and specifications
• Genuine Lennox OEM replacement blower motor
• Lennox part number: 23C04 / 607421-29
• ECM constant torque motor, factory pre-programmed
• Motor horsepower: 1/2 HP
• Voltage: 115 VAC
• Speed settings: 5 speed
• Speed range: 0–1100 RPM
• Designed for consistent airflow and improved energy efficiency
• Quiet operation and long service life
• Direct replacement for compatible Lennox systems
Applications
• Lennox residential furnaces
• Lennox air handlers
• HVAC systems requiring OEM ECM constant torque blower motors
Why choose a genuine Lennox ECM blower motor
Using a genuine Lennox motor ensures proper airflow balance, correct electrical characteristics, and full compatibility with the original control board. Aftermarket or incorrect motors can lead to airflow issues, higher energy usage, or premature system failure. This OEM motor helps protect system performance and maintain manufacturer design standards.