In short
Before anything is dismantled on a leaking WAN washer, check the simple three: the door seal fold, the drawer housing and the drain hose at the standpipe. On this platform those account for most of what owners report as a leak.
What owners of these models report
- A puddle under the middle of the cabinet — Hoses, clips and the pump live there, and water travels along the base before appearing, so the exact spot is only a hint.
- A slow drip that appears hours after the wash — Usually a fitting weeping under mains pressure rather than a tub leak, which would only show during a cycle.
- Water only on the drain step — Timing places this at the pump housing, the drain hose or the standpipe connection.
- Water tracking along the floor from behind to the front — The source is at the back and the destination is at the front, which is why the puddle position misleads so often.
- Wet wall or skirting behind the machine — That is the inlet side: a tap, a fitting or the hose union rather than anything inside the machine.
Causes, most likely first on this family
- Internal hose clip relaxed with age and vibration — A drum machine shakes its own plumbing loose over years; clips at the sump and the pump are the usual ones to go.
- Tub or bellows split — Last, and rare. It is the only cause on this list that needs the machine opened, and everything above it produces the same wet floor.
- Drawer housing blocked with detergent residue — Water backs up out of the drawer because the path into the tub has silted, and it presents identically to overdosing.
- Drain hose out of the standpipe or clipped badly — Ranks high because a hose that has worked loose empties a full tub onto the floor rather than dripping, which is why it is so dramatic.
What to check first, second, third
- Dry the floor completely and lay paper towel front, middle and back — The towel that wets first names the region, and that is a far stronger start than guessing from a puddle.
- Note which step of the cycle the water appears on — Fill, wash and drain implicate different components, so the timing is worth more than the location.
- Run the seal fold with a cloth and look for grit and tears — Second because it is the leading cause, and the inspection and the fix are often the same action.
- Watch a fill with the drawer open — Foam backing up is visible instantly, and it separates a dosing problem from a machine problem in one cycle.
Before you open anything
Safety
Switch the breaker off before a panel comes off. Mains, water and a heavy rotating drum share a small cabinet here, and the order of operations - power, water, then panel - is what keeps them apart.
Models in the WAN family
Reference| Model number | Family key |
|---|---|
| WAN24123AU | bosch:washer:wan |
| WAN24124AU | bosch:washer:wan |
| WAN24125AU | bosch:washer:wan |
| WAN28227AU | bosch:washer:wan |
| WAN28288AU | bosch:washer:wan |
The line between a fix and a call
Book a visit when the same fault returns after a correct repair. A repeat failure on these machines usually means a second fault upstream, and chasing it from the outside costs more weekends than it saves.
Other pages for this family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
