E08
Watersoft
Low Voltage / Power Supply Fault
E08 error and display is dim or flickering, unit may reboot randomly
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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
Failed Watersoft power adapter/transformer, Loose power connector at control board, Shorted component on control PCB, Overloaded circuit or incorrect voltage supply
How to Fix / Troubleshooting
Safety first: Disconnect the power adapter from the outlet before inspection.
- Check outlet and voltage: Confirm the outlet provides the correct voltage (typically 120V AC in North America) and is not shared with heavy loads that cause brownouts.
- Inspect power adapter: Feel the Watersoft transformer; it should be warm but not excessively hot. Look for cracks, burn marks, or frayed cable. Replace the adapter with an OEM-rated Watersoft power supply if suspect.
- Verify board connector: Remove the control cover and check the low-voltage power plug on the board. Reseat it firmly and ensure there is no corrosion.
- Isolate shorts: If the adapter shuts down when connected, disconnect non-essential loads (e.g., motor, valves) one at a time to see if a component is shorting the supply. Replace any component that causes the adapter to trip.
Persistent E08 after adapter replacement usually indicates a failing control board that should be replaced by a professional.
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Repair Difficulty
Medium
3/5
Required Part
Watersoft Power Adapter / Transformer
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