ERR8
AO Smith
Internal Memory / Parameter Error
AO Smith variable-speed pool pump shows “ERR8” and will not respond to speed commands.
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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
Corrupted EEPROM or firmware on control board, Power interruption during programming, Static discharge or surge affecting memory, Defective control board
How to Fix / Troubleshooting
Safety First: Turn OFF power before opening the control housing.
- Factory reset: Consult the AO Smith pump manual for the specific key sequence to perform a factory reset of parameters. This can sometimes clear memory errors.
- Stable power: Ensure the pump is on a dedicated circuit with a properly sized breaker to avoid frequent power interruptions during operation.
- Reprogram schedules: After a reset, re-enter desired speeds and run times, then monitor for recurrence of ERR8.
- Replace control board: If the error returns immediately after reset or prevents programming, the control board’s memory is likely damaged and the board should be replaced.
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Repair Difficulty
Hard
4/5
Required Part
Control Board / Drive Module
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