Problem summary
Error code E4 on Kenwood KID6 integrated dishwashers typically signals a fault with the appliance's motor, control board, or water circulation system. This error stops the wash cycle and prevents normal operation.
Likely causes
Based on repair patterns, E4 most often points to one of three issues:
Motor fault (18% of cases)
The wash motor may have failed or lost electrical contact. This is a sealed mechanical component that cannot be repaired at home.
Control board (PCB) failure (15% of cases)
The printed circuit board controls wash cycles and motor operation. Faults here require professional diagnosis with test equipment.
Water circulation problem (12% of cases)
A blocked or damaged hose, or fault in the diverter valve, may prevent water reaching the spray arms. The appliance detects this and triggers E4.
Why this needs an engineer
All three likely causes involve either electrical components (motor, PCB), sealed refrigeration/mechanical systems, or components requiring specialist tools to access safely. Attempting to disassemble or bypass these parts risks:
- Electrical shock from the control board
- Water damage if hose connections are disturbed incorrectly
- Voiding any remaining warranty
- Creating a safety hazard during operation
Do not attempt to reset the error by power-cycling or removing components yourself.
When to call SMC Services
Contact a qualified engineer as soon as possible if you see error E4. Before calling:
- Note the exact error code and when it first appeared
- Check that the inlet hose is connected and not kinked (visual check only)
- Confirm the appliance is switched off at the wall socket
A qualified engineer will:
- Run diagnostic tests to identify which component has faulted
- Access sealed parts safely using proper tools
- Replace faulty parts or repair electrical connections as needed
- Test the full cycle to confirm the fault is resolved
If you're in Northern Ireland, SMC Services can usually book a repair within 2–3 working days.