Lennox 23V78 - Lennox 624623-08, ECM Constant Torque Blower Motor, Pre-Programmed, 3/4 HP, 115 VAC 1 Ph 60 Hz, 0-1100 RPM

 

Lennox 23V78 (Lennox 624623-08) ECM Constant Torque Blower Motor is a genuine OEM replacement motor engineered for dependable airflow performance in residential and light commercial HVAC systems. This pre-programmed electronically commutated motor (ECM) delivers consistent torque output across a wide operating range, helping maintain proper system airflow while improving electrical efficiency compared to traditional PSC motors.

Designed for straightforward replacement, this 3/4 HP ECM blower motor operates on 115 VAC single-phase power at 60 Hz and supports variable speeds from 0 to 1100 RPM. The constant torque design automatically adjusts motor output to compensate for changes in static pressure, ensuring stable airflow through dirty filters or restrictive ductwork. This helps protect system components, improve comfort, and support proper heating and cooling operation.

Lennox 23V78 is factory programmed to meet original equipment specifications, eliminating the need for field programming. It is commonly used in Lennox air handlers and furnaces that require a constant torque ECM motor upgrade or direct OEM replacement. Ideal for service technicians and contractors seeking reliability, efficiency, and OEM fitment.

Key features and benefits
ECM constant torque technology for consistent airflow under varying load conditions
Pre-programmed OEM motor with no field setup required
3/4 HP output for demanding HVAC applications
Variable speed operation from 0 to 1100 RPM
115 VAC, single-phase, 60 Hz electrical rating
Improved energy efficiency compared to PSC blower motors
Direct replacement for Lennox part number 624623-08

 

Technical specifications

Manufacturer: Lennox
Lennox part number: 23V78
Alternate part number: 624623-08
Motor type: ECM constant torque blower motor
Horsepower: 3/4 HP
Voltage: 115 VAC
Phase: 1
Frequency: 60 Hz
Speed range: 0–1100 RPM
Programming: Factory pre-programmed

 

This Lennox ECM constant torque blower motor is ideal for maintaining proper system airflow, improving overall efficiency, and restoring original performance in compatible Lennox HVAC equipment. Suitable for professional installation in OEM-specified applications.