AO Smith
High-Speed Circuit Failure
AO Smith two-speed pool pump will only run on low speed; high speed does not engage.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open high-speed winding, Faulty high-speed contact in switch or relay, Burned connection at high-speed terminal, Incorrect wiring configuration
How to Fix / Troubleshooting
Safety First: Disconnect power before working on the motor or controls.
- Inspect switch/relay: Check the high-speed contacts in the speed selector switch or automation relay. Replace if pitted or burned.
- Check terminal connections: Tighten and inspect the high-speed terminal on the AO Smith motor for heat damage or loose wires.
- Measure winding resistance: A technician should compare resistance of high-speed winding to specifications. An open reading indicates failure.
- Replace motor if needed: If the high-speed winding is open or shorted, replace the motor assembly.
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Repair Difficulty
Medium
3/5
Required Part
Two-Speed Motor Assembly
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