Dishwasher displays E9 and may leak or trip the breaker when heating; often associated with integrated heater issues.

Safety first: Immediately switch off the appliance at the breaker. Do not continue using the dishwasher until the fault is resolved, as there is a risk of electric shock.

• Visual inspection: Remove the lower front or side panels to inspect the heater assembly (often part of the circulation pump). Look for burn marks, melted plastic, or signs of water leakage around the heater terminals.
• Check wiring: Inspect the heater wiring harness for damaged insulation or contact with metal parts. Secure any loose cables with proper clips.
• Insulation test (professional level): A proper diagnosis requires an insulation resistance test (megger) between heater terminals and earth. Low resistance indicates a leaking heater.
• Replace faulty heater: If there are visible signs of damage or confirmed leakage, replace the complete heater/pump assembly or heater module as supplied for your Becken model.

Because this error involves potential earth leakage, contact a qualified technician for accurate testing and repair.