Siemens Poor Wash Performance / Inadequate Cleaning

Dishwasher runs but dishes come out dirty; food residues remain on plates and glasses.

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Possible Causes

Clogged spray arms, Dirty filters, Low water temperature, Weak circulation pump, Incorrect loading blocking spray

How to Fix / Troubleshooting

Safety first: Disconnect power before removing spray arms if you need to work near sharp edges.

  • Step 1 – Clean filters:
    • Remove and thoroughly clean the filter assembly with hot water and a brush.
  • Step 2 – Clean spray arms:
    • Remove upper and lower spray arms.
    • Rinse and clear all jets with a toothpick or small brush.
    • Ensure they rotate freely when reinstalled.
  • Step 3 – Check loading:
    • Ensure large items are not blocking the rotation of spray arms.
    • Do not nest bowls or stack dishes so that water cannot reach surfaces.
  • Step 4 – Detergent and temperature:
    • Use high-quality dishwasher detergent and ensure rinse aid is filled.
    • Run a hotter program (e.g., intensive) to verify performance.
  • Step 5 – Circulation pump:
    • If cleaning and loading are correct but spray pressure seems weak, the circulation pump may be worn and require replacement.

Regular maintenance cleaning with a dishwasher cleaner helps maintain wash performance.

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Repair Difficulty

Easy 2/5

Required Part

Spray Arms or Circulation Pump
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