Bosch Partial Drain Blockage

The dishwasher does not drain at the end of the cycle; standing water remains in the tub, but no error code is shown.

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Possible Causes

Clogged drain hose, food debris in the drain pump, blocked air gap (if installed), obstruction at the sink/disposer connection

How to Fix / Troubleshooting

Safety first: Disconnect the power before working on the drain system.

  • Clean filters and sump: Remove the filters and clear any debris from the sump and drain pump inlet.
  • Check the air gap: If your installation uses an air gap on the sink, remove the cap and clean out any debris.
  • Inspect the drain hose: Detach the hose from the sink or disposer and flush it with water. Remove any clogs or kinks.
  • Test the drain pump: Run a drain-only or cancel/drain function and listen for the pump. If it hums but does not move water, inspect for obstructions or replace the pump.
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Video Guide

2 Videos

Repair Difficulty

Easy 2/5

Required Part

Drain Hose or Drain Pump
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