Lennox 44J07 Combustion Blower Assembly

The Lennox 44J07 Combustion Blower Assembly is a critical OEM replacement component engineered for precision drafting and flue gas venting in high-efficiency residential furnaces. This assembly features a heavy-duty, single-phase shaded pole motor operating at 115V-120V and 60Hz. Drawing approximately 1.5 Amps, the motor drives a high-performance blower wheel at speeds up to 3200 RPM, ensuring the optimal air-to-fuel ratio required for safe ignition and consistent heating cycles. Designed as a direct drop-in for the Lennox LB-65734D, this unit integrates the motor, housing, and impeller into a factory-sealed package to minimize pressure drops and eliminate the labor-intensive process of individual component swapping.

For service technicians, the 44J07 induced draft blower is a technical necessity when troubleshooting Lennox furnace error code 225 or 31, which often indicate pressure switch trip-outs due to inducer failure. This assembly includes the essential 50J77 gasket and mounting hardware to maintain an airtight seal at the heat exchanger interface. The motor is thermally protected with Class B insulation, rated for high-ambient operational stability within the cabinet. By restoring proper negative pressure, this direct-drive combustion air blower ensures the burner box stays clear of combustion byproducts, extending the life of the secondary heat exchanger and maintaining peak AFUE ratings.

• Precision Performance: High-speed 3200 RPM motor ensures consistent drafting and prevents pressure switch lockout cycles.
• OEM Engineering: Direct replacement for part numbers 44J07 and LB-65734D, featuring exact 3.3-inch motor frame alignment.
• Complete Installation Kit: Pre-assembled with housing, blower wheel, and 50J77 gasket for rapid field replacement.
• Robust Construction: Metal housing and thermally protected motor designed for the rigorous duty cycles of North American heating seasons.

Common Technical Questions

What furnace models are compatible with the 44J07?
This assembly is primarily found in G23, G26, and early G32 series units. It also serves as a cross-reference for various Allied, Armstrong, and Ducane models using the LB-65734D specification.

Does this unit address "inducer motor hum" or vibration?
Yes, the factory-balanced blower wheel and integrated motor mounts effectively eliminate mechanical resonance that occurs when older, worn bearings begin to fail or the impeller becomes fouled.

Is the gasket included in the box?
Yes, each 44J07 assembly ships with the necessary high-temperature mounting gasket to ensure a zero-leak connection to the vent collector box.

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.