How to Fix / Troubleshooting

Safety first: Disconnect power and close the water tap.

Check salt level: Open the salt reservoir cap in the tub and ensure it is filled with dishwasher salt. Wipe away any spilled salt from the tub bottom.
Inspect for blockages: Remove the side panel to access the water softener/side tank. Look for heavy limescale or salt bridging. Carefully break up salt bridges with a non-metallic tool.
Test regeneration valve: Locate the small regeneration valve/solenoid on the softener assembly. Check coil resistance with a multimeter. Replace if open or shorted.
Check wiring: Inspect connectors and harness from the valve and softener sensor to the control board.
Run a test cycle: After corrections, run a full cycle and monitor for E10. Persistent errors may require replacement of the entire softener assembly or control board.

Dishwasher shows E10; salt indicator may behave erratically and water softening does not function correctly.

Possible Causes