Problem summary
Your CAPLE integrated dishwasher is leaking water, and the E4 error code has appeared on the display. Error E4 indicates water has collected in the base of the appliance, which triggers a safety shutdown. This fault requires investigation to identify where the water is escaping.
Likely causes
Based on repair records for this fault pattern, the most common causes are:
- Motor failure (approximately 12% of cases) — a faulty wash motor can cause seals to fail or allow water to escape
- Pump malfunction (approximately 10% of cases) — a worn or damaged pump may leak during operation or drainage cycles
- Door seal degradation (approximately 5% of cases) — the rubber gasket around the door can perish, crack, or slip out of position, allowing water to escape during the wash cycle
Other potential sources include blocked or damaged drain hoses, loose internal plumbing connections, or issues with the sump cavity where water collects before draining.
Why this needs an engineer
All the likely causes involve sealed systems, electrical components, or mechanical assemblies that require safe, specialist handling:
- Motor and pump repairs involve mains-voltage electrical work and often sealed mechanical systems. Only a qualified engineer should diagnose and replace these.
- Door seal replacement may look straightforward, but incorrect fitting can lead to continued leaks and water damage to the cabinet.
- Internal plumbing or cavity faults require the appliance to be safely isolated and partially dismantled — work that risks further water damage if not done correctly.
Attempting to repair these components yourself may invalidate any remaining warranty, damage the appliance further, or create a safety hazard.
What to do now
- Stop using the appliance immediately. Leave the door open slightly to allow any water in the base to dry.
- Check whether water is pooling inside the cabinet (under the basket area) or leaking onto the floor beneath the appliance. Note where the water appears — this helps the engineer diagnose the fault faster.
- Do not attempt to disassemble panels, remove the motor, or access internal pipes yourself.
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 E4 fault indicates a safety sensor has detected water in the base, and continued use risks damage to the cabinet, flooring, or electrics. A qualified engineer will safely identify whether the leak originates from the motor, pump, door seal, or drainage system, and fit the appropriate replacement parts.