Lennox 27W74 Blower Motor
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Lennox 27W74 Blower Motor

Lennox 27W74 Blower Motor

As a field-tested HVAC professional, you know that keeping a Lennox system running at peak performance requires exact OEM replacements. The Lennox 27W74 Blower Motor is a high-efficiency 1/2 HP ECM blower motor designed specifically for constant torque applications in residential and light commercial units. This 208/230V single-phase assembly comes as a complete package with the factory-programmed ECM control module, ensuring a direct "plug-and-play" installation that eliminates the need for field programming. Operating within a 600-1200 RPM range, this 48-frame motor features a CCWLE rotation (Counter-Clockwise Lead End) and a standard 1/2" x 3.92" shaft, making it compatible with a wide array of Lennox air handlers and furnaces requiring variable speed air delivery. For contractors, this Lennox 101207-04 motor replacement restores original airflow specifications, maintains system static pressure balance, and utilizes a durable belly band mount for secure, vibration-free operation in a horizontal position.

Key Benefits for Technicians
  • Integrated Control Module: Factory-installed and programmed ECM module ensures immediate compatibility with Lennox system boards.
  • Consistent Airflow: High-efficiency 1/2 HP motor maintains steady CFM even as static pressure varies.
  • Precision Alignment: Features a standard 48 frame size and 5.58-inch diameter for exact fitment in factory blower housings.
  • Reliable Construction: Equipped with dual ball bearings and an open air-over (OAO) enclosure for optimal heat dissipation during continuous operation.
Common Technical Questions

Does this motor require a separate capacitor?
No. As a brushless ECM blower motor, the 27W74 uses internal electronic commutation provided by the integrated module, eliminating the need for a traditional run capacitor.

Can I use a 27U52 as a substitute for the 27W74?
While the 27U52 is often cited as a functional replacement, always verify the specific harness connections and programming curves for your specific Lennox model to ensure proper variable speed performance.

Is the module available separately?
This specific SKU (27W74) is provided as a complete motor and module assembly. Replacing the entire assembly is recommended to ensure the motor windings and electronic components are perfectly matched.

This item is not eligible for free shipping.

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.

$158.36

Original: $452.45

-65%
Lennox 27W74 Blower Motor

$452.45

$158.36

Lennox 27W74 Blower Motor

As a field-tested HVAC professional, you know that keeping a Lennox system running at peak performance requires exact OEM replacements. The Lennox 27W74 Blower Motor is a high-efficiency 1/2 HP ECM blower motor designed specifically for constant torque applications in residential and light commercial units. This 208/230V single-phase assembly comes as a complete package with the factory-programmed ECM control module, ensuring a direct "plug-and-play" installation that eliminates the need for field programming. Operating within a 600-1200 RPM range, this 48-frame motor features a CCWLE rotation (Counter-Clockwise Lead End) and a standard 1/2" x 3.92" shaft, making it compatible with a wide array of Lennox air handlers and furnaces requiring variable speed air delivery. For contractors, this Lennox 101207-04 motor replacement restores original airflow specifications, maintains system static pressure balance, and utilizes a durable belly band mount for secure, vibration-free operation in a horizontal position.

Key Benefits for Technicians
  • Integrated Control Module: Factory-installed and programmed ECM module ensures immediate compatibility with Lennox system boards.
  • Consistent Airflow: High-efficiency 1/2 HP motor maintains steady CFM even as static pressure varies.
  • Precision Alignment: Features a standard 48 frame size and 5.58-inch diameter for exact fitment in factory blower housings.
  • Reliable Construction: Equipped with dual ball bearings and an open air-over (OAO) enclosure for optimal heat dissipation during continuous operation.
Common Technical Questions

Does this motor require a separate capacitor?
No. As a brushless ECM blower motor, the 27W74 uses internal electronic commutation provided by the integrated module, eliminating the need for a traditional run capacitor.

Can I use a 27U52 as a substitute for the 27W74?
While the 27U52 is often cited as a functional replacement, always verify the specific harness connections and programming curves for your specific Lennox model to ensure proper variable speed performance.

Is the module available separately?
This specific SKU (27W74) is provided as a complete motor and module assembly. Replacing the entire assembly is recommended to ensure the motor windings and electronic components are perfectly matched.

This item is not eligible for free shipping.

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.

Product Information

Shipping & Returns

Description

As a field-tested HVAC professional, you know that keeping a Lennox system running at peak performance requires exact OEM replacements. The Lennox 27W74 Blower Motor is a high-efficiency 1/2 HP ECM blower motor designed specifically for constant torque applications in residential and light commercial units. This 208/230V single-phase assembly comes as a complete package with the factory-programmed ECM control module, ensuring a direct "plug-and-play" installation that eliminates the need for field programming. Operating within a 600-1200 RPM range, this 48-frame motor features a CCWLE rotation (Counter-Clockwise Lead End) and a standard 1/2" x 3.92" shaft, making it compatible with a wide array of Lennox air handlers and furnaces requiring variable speed air delivery. For contractors, this Lennox 101207-04 motor replacement restores original airflow specifications, maintains system static pressure balance, and utilizes a durable belly band mount for secure, vibration-free operation in a horizontal position.

Key Benefits for Technicians
  • Integrated Control Module: Factory-installed and programmed ECM module ensures immediate compatibility with Lennox system boards.
  • Consistent Airflow: High-efficiency 1/2 HP motor maintains steady CFM even as static pressure varies.
  • Precision Alignment: Features a standard 48 frame size and 5.58-inch diameter for exact fitment in factory blower housings.
  • Reliable Construction: Equipped with dual ball bearings and an open air-over (OAO) enclosure for optimal heat dissipation during continuous operation.
Common Technical Questions

Does this motor require a separate capacitor?
No. As a brushless ECM blower motor, the 27W74 uses internal electronic commutation provided by the integrated module, eliminating the need for a traditional run capacitor.

Can I use a 27U52 as a substitute for the 27W74?
While the 27U52 is often cited as a functional replacement, always verify the specific harness connections and programming curves for your specific Lennox model to ensure proper variable speed performance.

Is the module available separately?
This specific SKU (27W74) is provided as a complete motor and module assembly. Replacing the entire assembly is recommended to ensure the motor windings and electronic components are perfectly matched.

This item is not eligible for free shipping.

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.