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 VideosRepair Difficulty
Easy
2/5
Required Part
Drain Hose or Drain Pump
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