Winterhalter Poor Wash Performance / Insufficient Cleaning

Dishes not coming clean; food residues and film remain after normal cycle, no error code displayed.

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Possible Causes

Clogged spray arms, Low wash pressure due to worn wash pump, Incorrect detergent concentration, Blocked tank filters

How to Fix / Troubleshooting

Safety first: Turn off the machine and allow it to cool before cleaning internal parts.

  • Clean filters: Remove and thoroughly clean all tank filters and strainers.
  • Clean spray arms: Remove upper and lower spray arms, flush under running water, and clear blocked jets with a toothpick.
  • Check detergent dosing: Confirm that the detergent drum is not empty and that dosing settings match the chemical supplier's recommendation.
  • Check wash pressure: During operation, observe spray arm rotation through the door (if possible). Slow or no rotation may indicate a weak wash pump that needs replacement.
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Repair Difficulty

Easy 2/5

Required Part

Upper and Lower Spray Arms
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