Lochinvar & A.O. Smith 100109964 Motor

The Lochinvar & A.O. Smith 100109964 Motor is a high-performance 1/2 HP blower motor engineered for specific high-efficiency commercial boilers and water heaters. Operating at 200V with a rated speed of 6000 RPM, this ECM combustion blower motor is critical for maintaining precise air-to-fuel ratios during the pre-purge and ignition cycles. This component serves as a direct OEM replacement motor for various Lochinvar Knight and A.O. Smith Cyclone models, ensuring the integrated control board can accurately modulate fan speed based on demand. Technicians should verify the 100109964 part number against the appliance data plate to confirm fitment, as the high-speed operation is calibrated for specific heat exchanger pressures. Replacing a failing inducer with this HVAC blower assembly motor restores system static pressure and prevents nuisance pressure switch trips, ensuring stable combustion across all firing rates in demanding hydronic applications.

• Direct OEM Compatibility: Ensures seamless integration with existing Lochinvar and A.O. Smith wiring harnesses and control logic.
• Variable Speed Precision: The 6000 RPM capability allows for wide modulation ranges in high-efficiency condensing equipment.
• Industrial Build Quality: Designed to withstand the high ambient temperatures common in sealed combustion chambers.
• Electrical Efficiency: The 200V configuration provides the necessary torque for heavy-duty commercial blower wheels.

What are the symptoms of a failing 100109964 motor?
Technicians typically observe "F9" or "Latching" fault codes related to fan speed errors, or audible bearing noise during the pre-purge cycle. If the motor fails to reach the calibrated 6000 RPM, the pressure switch will not close, preventing ignition.

Is this motor compatible with 120V systems?
No, this is a dedicated 200V component. Applying incorrect voltage will damage the internal drive electronics of the motor.

Does this include the blower housing?
This part number typically refers to the motor unit itself. Always inspect the blower wheel and housing for debris or damage when swapping the motor to ensure balanced operation.

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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.