Softener will not power on; display is blank.

Safety: Verify the outlet is safe and dry before plugging or unplugging the adapter.

• Check outlet: Test the wall outlet with another device to confirm it has power.
• Inspect adapter: Check the Hansgrohe power adapter for damage, overheating, or loose plug. Replace if suspect.
• Check low-voltage plug: Ensure the low-voltage connector from the adapter is fully seated in the control head.
• Internal fuse: If accessible, check any internal fuse on the control board and replace with the exact type if blown.
• Board replacement: If the unit still does not power on with a known-good adapter, the control board is likely defective and should be replaced.