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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