What is actually going on
The WQP line takes its supply from a switched spur in the adjacent cabinet on most installations, so on the models listed in the table on this page a dark panel is very often a switch that was turned off during other work rather than an appliance fault.
What you are seeing
- The cycle starts and stops within seconds — An immediate stop is a first-check failure, and the first check is water.
- The breaker trips when the machine is switched on — A trip on switch-on is reporting a real fault. That much is common to the whole WQP line.
- The buttons do not respond at all — A control lock, or a damp control panel. Both are common and neither is a board fault.
- The machine hums but never fills — A hum with no fill is a supply problem.
- The panel is completely dark — No lights and no response to any button. That is a supply question before it is an appliance question.
- NEAR MISS — the machine is in a delay-start programme — Delay start is easy to set by accident and looks exactly like a dead machine.
- NEAR MISS — the door was left slightly ajar — Close the door fully and see whether the programme picks up.
What is most likely, and why
- A failed door latch assembly — Top of the list here. When the latch no longer clicks at all, the assembly is the suspect. It is one of the few places the models listed in the table on this page genuinely diverge.
- A control board fault — Second. Last, and over-diagnosed. It deserves the name only when the supply, the latch and the water are all proven good.
- No power at the spur or a tripped breaker — Third in the order. Most dishwashers are fed from a switched spur hidden in a neighbouring cabinet, and it gets turned off and forgotten. That holds for every model the table on this page lists.
- A door that no longer aligns with its catch — Further down. Hinge springs weaken, the door drops, and the catch no longer engages squarely.
- A damp or failed touch panel — Fifth, and uncommon. Steam reaching the control fascia makes buttons unresponsive or erratic, and it can clear once it dries.
Working through it in order
- Find and check the spur switch — It is usually in the cabinet beside the machine or above the worktop. Switching it on solves a surprising number of these.
- Try the shortest programme available — A rinse cycle asks the least of the machine and often runs when a full programme will not. On the models listed in the table on this page this is the check that decides the job.
- Look for a control lock symbol — A small key or padlock on the display. Holding two buttons usually clears it.
- Switch off at the spur for a few minutes and retry — A hard reset clears a control that has latched an error.
Isolate it first
Safety
Switch the circuit off before you start and close the tap under the sink. The door latch and its switch are part of how the machine protects the room from a hot tub, so leave them alone. Towels under the front edge save the floor when the sump is opened.
Models in the WQP family
Reference| Model number | Family key |
|---|---|
| WQP12-77E1B-US | bertazzoni:dishwasher:wqp |
| WQP8-7740-US | bertazzoni:dishwasher:wqp |
Where the owner line is
Call once the spur, the breaker, the tap and the latch are all proven and the machine still will not begin. What is left is the latch switch or the control, and both need testing at the connector.
The pages next to this one
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
