Problem summary
Your Kenwood integrated dishwasher is displaying error code E4 and has stopped operating normally. This code points to a fault in one of three main systems: the wash motor, the pump, or the printed circuit board (PCB) that controls them.
Likely causes
Based on engineer reports across 41 similar faults, the most common culprits are:
Motor (17% of cases)
The wash motor may have failed electrically or mechanically. This drives the wash action during the cycle.
Pump (15% of cases)
The drain or circulation pump could be blocked, seized, or electrically faulty. A blocked pump often triggers error codes when the system detects no water flow.
PCB – Printed Circuit Board (15% of cases)
The control board may have developed a fault, causing it to misread sensors or fail to send power to the motor or pump.
Why this needs an engineer
All three of these components involve sealed systems, electrical circuits, or mechanical parts that require specialist tools and safe isolation from the mains. Attempting to access or repair them without proper training risks electrical shock, water leaks, or further damage.
Even identifying which component has failed often requires fault-code reading equipment and access to the sealed areas of the dishwasher.
What to do before you call
- Note down when the error appeared and whether the dishwasher had completed any cycles before it started showing the code.
- Check for any visible water leaks underneath or around the appliance (this may point to a pump issue).
- Do not attempt to run another cycle; repeated attempts may cause further damage.
- Make sure the appliance is switched off at the wall socket.
If you're in Northern Ireland, SMC Services can usually book a repair within 2–3 working days.
When to call SMC Services
Contact a qualified engineer as soon as possible. The error code will not clear itself, and running the dishwasher with a fault active can lead to water damage or complete failure.