Indesit Partial Drainage / Sump Blockage

Dishwasher not draining but no error code displayed; water remains at the bottom after cycle completes.

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Possible Causes

Clogged sump filter, Partial blockage in drain hose, Food debris in drain pump impeller, Incorrect drain hose installation height causing backflow

How to Fix / Troubleshooting

Safety: Switch off and unplug the dishwasher before working inside the tub or on hoses.

Clean internal filters:

  • Remove lower basket and take out all filter components in the base.
  • Rinse under hot water and scrub away grease and food particles.

Check sump and pump:

  • Use a torch to look into the sump opening; remove any visible debris.
  • If accessible, remove the small pump cover and check the impeller area for obstructions.

Drain hose and installation:

  • Ensure the drain hose rises in a loop to the underside of the worktop before going to the sink trap; this prevents backflow.
  • Disconnect the hose at the sink trap and flush it through with hot water.

Run a rinse cycle to confirm that water now drains fully.

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Repair Difficulty

Easy 2/5

Required Part

Drain Pump or Drain Hose
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