In short
The WAN family will not begin a cycle until the door lock reports closed, which is why the commonest cause of a no-start on this platform is a door that looks shut and is not quite latched.
The observable tells
- A delay-start time is counting down — The machine is doing exactly what it was asked. It is worth checking before anything is opened.
- The drum hums but does not turn — Power is reaching the motor and something is stopping the drum, so this is a jam or a motor fault rather than a no-start.
- NEAR MISS - the cycle starts and stops within a minute — That is a stalled cycle rather than a no-start, and the cycle fault page for this family covers it.
- The display lights but the cycle never begins — The machine has power and is waiting for a condition - a lock, a selection, or a gate it cannot pass.
- No lights, no display, nothing at all — That is supply: socket, plug, fuse or breaker, and it is the shortest branch of this diagnosis.
Ranked causes for these models
- Water not arriving so the first gate never passes — The machine accepts the start, waits for its fill, and appears to be doing nothing at all. Closed taps are the usual reason.
- Control board failure — Last, because everything above it produces the same dead machine, and because a board swap on a guess is the most expensive way to be wrong here.
- Door lock mechanism failed — Distinct from a door that is not latched: here the door closes correctly and the lock still does not report, and that is a part.
- Child lock or delay start engaged — Ranks high because it produces an apparently dead machine with nothing wrong, and because it is easy to set by accident.
Working the fault in order
- Press the door firmly until it latches and listen for the lock — Second because the lock is the first gate the machine checks, and because a soft close is the commonest cause of all.
- Look for a child-lock or delay symbol on the display — Free, instant, and it explains an apparently dead machine that is in fact working perfectly.
- Check the breaker and any fused spur behind the machine — Low in the order because it needs access, but it is the finding that explains a dead machine with a live-looking kitchen.
- Test the socket with a lamp or another appliance — It separates the dead-machine branch from the waiting-machine branch instantly, and it needs nothing you do not already own.
Safety first
Safety
Disconnect power and close the inlet taps before starting. A machine that has stopped mid-cycle may still be holding a tub full of water, and that water leaves through the drain filter whether you are ready for it or not.
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 |
When to stop and book a visit
The line here is the drum. The filter, the hoses, the taps and the load are yours; anything that needs the drum out, the tub split or a board read belongs to a technician with the bench space to do it.
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.
