Why is my Bosch washing machine leaking?
Water pooling under your Bosch washer usually points to a worn seal, blocked drain, or faulty pump. Follow these steps to pinpoint the exact problem.
Most likely causes
- 35% Worn door seal (gasket) allowing water to escape during wash cycles
- 25% Cracked or loose pump causing water to leak from the base during drainage
- 20% Blocked or kinked drain hose preventing proper water exit and causing backflow
- 12% Damaged inlet valve allowing water to leak continuously into the drum
- 8% Perforated or split drum allowing water to escape into the outer tub
How to diagnose it
- 1
Check for standing water
Pull the machine away from the wall and look underneath. Is water pooling directly below or around the drum area? Note the exact location.
💡 Use a torch to see clearly under the base.
- 2
Inspect the door seal
Open the door fully and run your finger around the rubber gasket. Feel for cracks, tears, or hardened areas. Check for visible mould or debris.
💡 A visibly damaged seal needs replacement—this is the most common cause.
- 3
Examine the drain hose
Locate the drain hose at the back of the machine. Press along its length to feel for cracks. Check it isn't kinked, trapped, or pushed too far into the standpipe.
💡 The hose should sit 20-30cm inside the standpipe, not deeper.
- 4
Test the pump filter
Open the pump access panel at the bottom front. Turn the filter anticlockwise to remove it. Look for lint, coins, or blockages inside and in the pump opening.
💡 Clean the filter and refit. Run a short cycle to check if leaking stops.
- 5
Run a diagnosis cycle
Close all checks, set the machine to a 30°C cotton wash with 1 litre of water inside. Watch for water escaping during fill, wash, and drain phases.
💡 Note exactly when water appears—this tells you whether it's a seal, pump, or drain issue.