A.O. Smith / Century Pool & Spa Motor Manual
AO Smith Century pool and spa motor manual. Wiring diagrams, service factor ratings, capacitor specs, and reference for single-speed and dual-speed motors.
Common Motor Problems This Guide Covers
A pool technician should open this document when they need to install, maintain, service, or troubleshoot an A.O. Smith Century brand pool or spa motor..
What it helps you resolve
- Pool pump motor not turning on
- Motor making unusual noises
- Motor needs routine service or maintenance
- Motor is beyond repair and needs replacement guidance
- Troubleshooting common pump motor problems
When not to use
This document is not the right one to reach for when dealing with non-Century brand motors, general pool system issues unrelated to the motor, or for detailed electrical schematics beyond basic troubleshooting.
Fault codes covered
Quick diagnosis
For a motor that won't start, first check for a thermal overload trip: most Century motors have a reset button on the end bell; press it after the motor cools. If the motor hums but won't turn, suspect a failed start capacitor. Verify voltage at the motor terminals before suspecting a winding failure.
Qualified personnel only. Opening electrical panels, control boards, or equipment enclosures involves dangerous voltages and should only be performed by licensed pool or electrical technicians. Unauthorized service may void your manufacturer warranty. If unsure, contact a qualified professional.
Still seeing issues with your A.O. Smith / Century Pool & Spa Motor Manual?
Our certified technicians know every fault code in this document, including OH, and can diagnose your A.O. Smith motor in person across the Oak Island area.
Request ServiceA.O. Smith Motor FAQs
What does the 'OH' error code mean on a Century pool motor?
'OH' indicates the motor's internal thermal overload protector has tripped due to overheating. Allow the motor to cool, then locate and press the reset button on the motor end bell. If OH trips repeatedly, inspect for blocked ventilation, incorrect voltage, or a failing capacitor.
Will motor issues clear on their own after a reset?
A thermal overload trip will reset automatically once the motor cools, but the underlying cause (blocked airflow, low voltage, failing capacitor) must be addressed or the motor will continue to trip. Electrical faults such as a failed capacitor or winding failure require replacement and will not self-clear.
What causes the most common motor faults?
The manual implies that common motor faults often stem from general wear, tear, and the need for routine service and maintenance, which the document aims to help address.
How does this manual differ from a general A.O. Smith product catalog?
This manual is specifically designed as a pocket guide for the installation, maintenance, service, and troubleshooting of A.O. Smith's *Century* brand pool and spa motors, rather than a broad catalog of all A.O. Smith products.