Williams 7810 Fan Motor

Q: Is the Williams 7810 a direct replacement for my existing fan motor?

Yes, the 7810 is the verified replacement for part numbers A0408B2772 and P108100A. Always verify the shaft diameter and voltage before installation to ensure a proper match with your specific unit.

Q: What are the benefits of using an OEM-spec motor over a universal alternative?

Using the Williams 7810 ensures that the mounting points, shaft length, and electrical characteristics align perfectly with the original system design, maintaining the unit's UL listing and airflow efficiency.

Williams

$189.58

The Williams 7810 Fan Motor is a critical replacement component engineered for 115V HVAC applications, specifically designed to restore original equipment performance in Williams furnace assemblies. This 115v fan motor features a precision-machined 5/16" shaft, ensuring a secure fit with blower wheels and fan blades. As the direct OEM-spec replacement for P108100A and A0408B2772, the 7810 eliminates the guesswork often associated with universal motors that require field modifications. For technicians servicing wall furnaces or air handlers, this motor provides the necessary torque and RPM to maintain static pressure and design airflow. Using a drop-in Williams replacement motor ensures the electrical load matches the circuit board’s requirements, preventing premature component failure. This HVAC blower motor is built for continuous duty cycles, providing reliable thermal protection and vibration-free operation in residential or light commercial settings.

Key Benefits for Technicians

Direct OEM Interchange: Replaces factory parts P108100A and A0408B2772 without bracket modifications.
Precision Shaft Lead: The 5/16" diameter shaft is engineered for high tolerances to prevent blower wheel wobble.
Electrical Compatibility: Optimized for standard 115V furnace motor circuits, ensuring stable amp draw during peak operation.
Rugged Housing: Designed to dissipate heat effectively in enclosed cabinet environments, extending the life of the internal windings.
Quiet Operation: Balanced rotor assembly minimizes harmonic noise and vibration across the ductwork.

Common Installation Questions

Is the Williams 7810 a direct replacement for my existing fan motor?
Yes, the 7810 is the verified replacement for part numbers A0408B2772 and P108100A. Always verify the shaft diameter and voltage before installation to ensure a proper match with your specific unit.

What are the benefits of using an OEM-spec motor over a universal alternative?
Using the Williams 7810 ensures that the mounting points, shaft length, and electrical characteristics align perfectly with the original system design, maintaining the unit's UL listing and airflow efficiency.

Does this motor require a specific capacitor for installation?
Technicians should verify the motor nameplate during installation; however, as a direct replacement, it is designed to integrate with existing Williams furnace control configurations.

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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.