The short answer
The first question on a Black+Decker BDW dishwasher that will not begin is whether it has power: a completely dark panel and a lit panel that ignores the start button are two different faults with two different lists. This page splits them at the first step, because everything after that depends on the answer. Settle the build before the ranking applies: these models divide on a filter that twists out of the tub floor.
What the owner actually sees
- The panel is completely dark — That is a power question — outlet, breaker or the supply to the machine — before it is anything else.
- The panel responds but the cycle never begins — Power is there; something is refusing the cycle — the latch, a lock, or a delay.
- A tone, then back to idle — Usually a door or lock state being reported rather than a fault.
- It starts and stops after a minute or two — Note whether it had taken any water first.
- The cycle starts and nothing arrives — Check the isolating valve under the sink.
- NEAR MISS — the cycle completes with poor results — Nothing here applies once a cycle runs to the end.
Causes, ranked for the BDW build
- The door is not latching, or the latch is out of alignment — It leads because the interlock is absolute: the machine will not run with the door a millimetre open, and a latch that has drifted gives no clue on the panel. Look for wear on the hooks and for a strike plate that has moved.
- A control lock, child lock or delayed start is set — Second, and top of the list on any machine with small children in the house, because the lock is designed to be invisible in normal use.
- Power: the outlet, the breaker or the spur that feeds it — A dishwasher is often on a shared kitchen circuit, so the breaker is worth reading rather than assuming.
- The water supply valve is closed or the inlet is blocked — Mid-list: it explains a machine that appears to start and then stops rather than one that never responds.
- The thermal fuse, the door switch or the control board — Last, because it is the only cause here that needs a technician, and because the four above it explain most complaints.
The order that finds it fastest
- Look at the panel: lit or dark? — Everything after this depends on which half you are in.
- Push the door firmly shut and press start again — A cycle that starts when you press the door home names the latch and nothing else.
- Check for a control lock or a delayed start — Holding the lock key for a few seconds is the usual release, and a delay simply has to run out or be cancelled.
- Prove the supply with something else — Only relevant where the machine is dark.
- Check the water isolating valve under the sink — Turn it fully open rather than partly.
Power off first
Safety
Switch the machine off at its breaker before reaching behind the kick plate or the door panel — water and mains wiring share the same small space in a dishwasher, and a capacitor can hold a charge after the power is off. Leave the door latch and its switch exactly as they are: the machine is meant to stop the moment the door opens.
When to call a technician
The condition is whether anything remains that can be changed from outside the machine. Doors, latches, locks, delays, breakers and the supply valve are all outside. The switch behind the latch, the fuse and the board are inside, and a thermal fuse that has opened usually has a reason behind it that wants finding rather than replacing. Call at that point, and say what the panel was doing — it shortens the visit.
Other faults covered for the BDW models
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Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
