Specifications

• Manufacturer: Lennox
• Lennox Part Number: 68K21
• Model Number: LB-65734G
• Product Type: Combustion Air Blower / Draft Inducer Assembly
• Voltage: 115V
• Frequency: 60 Hz
• Amperage: 2.5A
• Speed: 3400 RPM
• Rotation: CW (Clockwise)
• Includes: Blower housing, motor, blower wheel, gasket, mounting screws, and orifices.

Common Symptoms of a Faulty Combustion Air Blower

• Furnace will not ignite.
• Pressure switch remains open.
• Inducer motor does not start.
• Grinding, squealing, or rattling noises.
• Motor hums but the blower wheel does not rotate.
• Furnace locks out with a pressure switch or venting fault code.
• Weak draft causing ignition failures.
• Excessive vibration from the inducer assembly.