AO Smith
No Display / Dead Control Panel
AO Smith variable-speed pool pump display is blank, but line voltage is present at the motor.
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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
Blown low-voltage fuse on control board, Failed display module, Faulty control transformer or power supply on board, Loose internal connectors
How to Fix / Troubleshooting
Safety Warning: Internal components may carry hazardous voltages. Only qualified persons should service the control board.
- Verify line power: Confirm that correct voltage is present at the pump’s line terminals.
- Inspect internal fuses: With power OFF, open the control housing and look for small fuses on the AO Smith control board. Replace only with identical type and rating if blown.
- Check connectors: Ensure the display ribbon cable and other harnesses are fully seated.
- Look for board damage: Inspect for burned components or corrosion. If present, the board should be replaced.
- Replace display or board: If fuses and wiring are good but the display remains blank, replace the display module or entire control board/drive module as specified by AO Smith.
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Repair Difficulty
Hard
4/5
Required Part
Control Board / Drive Module
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