E10 error and the display is blank or flickers while the unit is plugged in.

Safety first: Disconnect the power adapter from the wall before inspecting it. Do not open the adapter casing.

Step-by-step:

• 1. Test the outlet: Plug another device (like a lamp) into the same outlet to confirm it has stable power.
• 2. Inspect the adapter: Check the AquaHouse-branded adapter for damage, frayed cable, or burn marks. Ensure it matches the voltage and amperage specified on the softener label.
• 3. Check the DC connection: Verify the plug is fully seated in the control head. Wiggle gently; if the display flickers, the jack or plug may be loose.
• 4. Try a known-good adapter: If available, test with a compatible AquaHouse replacement adapter. If the display stabilizes, replace the original adapter.
• 5. Inspect the PCB: If a good adapter does not resolve E10, remove the control cover and look for burnt components or a damaged DC jack on the board. These conditions require board replacement.