Pentair Sta-Rite
No Low‑Voltage Power to User Interface
Variable‑speed pump display is blank but power is present at the breaker
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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 drive board, Failed internal power supply, Loose display connector
How to Fix / Troubleshooting
Safety: Turn off power and wait several minutes for capacitors to discharge before opening the drive.
- Verify line power: Confirm correct voltage at the pump input terminals with a multimeter (by a qualified person).
- Inspect internal fuse: Remove the drive cover and look for a small low‑voltage fuse on the control board. If blown, replace with the exact same type and rating.
- Check display connector: Ensure the ribbon cable or plug from the display/keypad is firmly seated on the board.
- Test after reassembly: Restore power and see if the display lights. If still blank with correct line voltage, the drive control module is likely defective.
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Repair Difficulty
Hard
4/5
Required Part
Drive Control Module
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