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A WNA washer that starts a cycle and then stops is usually waiting for a condition it cannot reach - enough water, a locked door, a drained tub or a temperature - rather than suffering a broken part. The machine is not stuck; it is stalled at a step, and finding the step is the diagnosis.
What you observe
- The programme time stops counting down and stays put — The machine is waiting at a step. Where the timer froze is the most useful single clue you have.
- NEAR MISS - the cycle takes much longer than the label says — Programme times are nominal and adapt to conditions. A long cycle is not a stalled cycle.
- The time remaining goes up instead of down — Normal adaptive behaviour when the fill is slow or the load is unbalanced, not a fault on its own.
- The display shows a fault and the machine stops immediately — The control has detected the failed condition itself; read what the machine says before overriding it.
- The cycle finishes but the drum is still full of water — A drain gate that was never satisfied, which is why the door stays locked afterwards.
Ranked causes for these models
- Control board or wiring fault — Last, because every cause above produces the same stall for far less money, and because a board is diagnosed by elimination rather than by inspection.
- Pressure or level sensing reading wrong — The machine acts on a level that is not true, so it either never fills enough or believes it is already full.
- Drain blocked at the filter or the hose — Second, and the reason so many stalled cycles end with a full drum and a locked door: no drain, no progress, no release.
- Restricted fill: taps part-closed or inlet filters blocked — First on this family because the machine will not proceed until it has its water, and a partly open tap produces exactly this stall.
Working the fault in order
- Check the drain hose height and that it is not pushed deep into the standpipe — An installation fault rather than a component fault, and one that produces an intermittent stall that looks electrical.
- Open the drain filter and clear it — Do this early whenever the drum is holding water: it is both the test and the repair for the second-ranked cause.
- Watch the fill rate with the drum empty — A fill that trickles is a restriction upstream, and seeing it removes the guesswork about whether the water is arriving.
- Run the shortest programme available with an empty drum — Removes the load and the heating variables at once and shows whether the basic sequence can complete at all.
Safety first
Safety
Disconnect the plug before servicing, and put a towel and a shallow tray under the filter door. There is always water left in the sump even when the display says the cycle finished.
Models in the WNA family
Reference| Model number | Family key |
|---|---|
| WNA14400AU | bosch:washer:wna |
| WNA254U1AU | bosch:washer:wna |
| WNA254U3AU | bosch:washer:wna |
Where the owner fix ends
The service call starts where the wiring does. Checking a filter, a hose or a load is fine; tracing a harness behind the tub of a machine that is plumbed in is not, and a technician does it in one visit.
Related faults on these models
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