Lennox 23V91 - Lennox 607421-33, ECM Constant Torque Blower Motor, Pre-Programmed, 3/4 HP 115 VAC, 5 Speed, 550-1300 RPM
Lennox 23V91 (607421-33) is a genuine OEM ECM constant torque blower motor designed to deliver reliable, energy-efficient airflow performance in residential and light commercial HVAC systems. This pre-programmed motor eliminates the need for field programming, allowing for faster installation and consistent operation across compatible Lennox air handlers and furnaces.
Built with advanced ECM technology, the Lennox 23V91 maintains stable airflow under varying static pressure conditions, improving system comfort and efficiency compared to traditional PSC motors. With a 3/4 HP rating, wide RPM range, and multiple speed taps, it is well suited for demanding HVAC applications that require dependable torque and smooth operation.
This motor operates on standard 115 VAC power and supports five selectable speeds, making it an ideal direct replacement for original equipment motors specified by Lennox. As a factory OEM component from Lennox, it ensures proper fit, electrical compatibility, and long-term reliability.
Key features and specifications
• OEM Lennox replacement blower motor
• Part number: 23V91 / 607421-33
• ECM constant torque technology
• Pre-programmed for plug-and-play installation
• Motor power: 3/4 HP
• Voltage: 115 VAC
• Speeds: 5 speed taps
• Speed range: 550–1300 RPM
• Designed for consistent airflow and improved efficiency
• Suitable for Lennox furnaces and air handlers requiring ECM constant torque motors
Applications
This motor is commonly used in Lennox residential and light commercial HVAC systems where constant torque airflow control is required. It is ideal for replacing failed or aging ECM blower motors while maintaining original system performance.
Why choose this motor
Using a genuine Lennox ECM blower motor helps protect your HVAC system from airflow imbalance, electrical mismatch, and premature failure. OEM construction ensures dependable operation, quieter performance, and compatibility with factory specifications.
For proper fitment, always verify your unit model and original part number before ordering.