BECKEN Backflow / Check Valve Issue

Water remains in the bottom of the dishwasher between cycles, causing a stale smell.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Faulty non-return valve in drain system, Incorrect drain hose height, Blocked sink trap causing backflow, Siphoning from sink

How to Fix / Troubleshooting

Safety first: Unplug the dishwasher before working on the drain system.

  • Check drain hose routing: Ensure the Becken dishwasher drain hose has a high loop (usually under the worktop) to prevent backflow from the sink.
  • Inspect sink trap: Clean the sink trap and ensure water can flow freely away.
  • Check non-return valve: Access the sump from inside the tub and locate the non-return valve near the drain outlet. Remove and clean it, ensuring it moves freely and seals properly.
  • Test after cleaning: Run a short cycle and check if water remains. If so, the check valve or drain hose may need replacement.

Proper drain configuration is essential to prevent dirty water from re-entering the dishwasher.

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Repair Difficulty

Medium 3/5

Required Part

Non-Return Valve and Drain Hose
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