E10
Water2Buy
Low Voltage / Power Supply Fault
E10 error and no display or very dim display on the control panel
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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 Water2Buy power adapter, Loose DC plug connection, Shorted control board, Damaged internal voltage regulator
How to Fix / Troubleshooting
Safety first: Disconnect the power adapter from the mains before testing.
- Check outlet: Plug another device into the same outlet to confirm it has power.
- Test adapter output: Use a multimeter to measure the DC output of the Water2Buy adapter. It should match the rated voltage (e.g. 12V DC). Replace the adapter if there is no output or it is significantly low.
- Inspect DC jack: Ensure the adapter plug fits snugly into the softener’s DC socket. Wiggle gently while watching the display for flickering, which indicates a loose jack.
- Inspect PCB: If comfortable and with power disconnected, remove the control cover and look for burnt components or a smell of burnt electronics. Do not touch components if you are unsure.
- Replace board if needed: If a known-good adapter does not restore normal operation, replace the control PCB or full head assembly.
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Repair Difficulty
Medium
3/5
Required Part
Water2Buy power adapter
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