What you are most likely looking at
On a Café dishwasher the useful split is simple: does the circuit hold with the machine isolated? Everything follows from that answer. That puts water reaching a connection or the base tray at the top of the list here and a missing or poor earth connection at the bottom.
What you observe
- The breaker or RCD trips when the machine runs — Usually at the same stage each time, which names the component.
- The trip happens at the same point in every cycle — That repeatability is the most useful evidence there is.
- A faint smell of hot insulation after a cycle — Stop using the machine and isolate it.
- NEAR MISS — the machine will not start but nothing has tripped — That is a no-start question and it is far less urgent.
What causes this, in order of likelihood here
- Water reaching a connection or the base tray — A leak inside the machine finds the wiring, and the protection does exactly what it should. Plumbed premium units carry a filter, a valve and a long internal tube run, every one of which is a candidate the moment water appears.
- A heating element that has failed to earth — The classic RCD trip: the element leaks to earth once it heats, so the machine trips at the same stage every cycle. Supply is proved before anything is condemned, because a dead outlet and a dead appliance look identical.
- A loose or corroded junction-box connection — Under the tub, warm and damp, and it arcs before it fails. It sits here because an electrical cause is both the cheapest to rule out and the one with real safety weight.
- A missing or poor earth connection — The tingle symptom, and the one that has to be corrected before anything else is investigated.
What to check first, second, third
- Note the stage at which it trips — Tripping during the heat is the element; during the drain is the pump.
- Switch the machine off and see whether the circuit holds — It separates the appliance from the circuit in one step.
- Note whether the trip is repeatable at the same stage — Same stage every time points at a component; random points at the circuit.
- Run the machine on a cold, short programme — If it completes without tripping, the heating circuit is implicated.
What to try yourself
- Switch the machine off at the breaker and leave it off — This is the only owner step for a tripping or tingling machine.
- Reset the breaker once, with the machine isolated — If the circuit holds without the machine, the machine is the fault.
- Write down the stage and the programme at which it trips — It saves a technician a visit of guesswork.
- STOP — everything else on this page is licensed work — Elements, motors, junction boxes and earthing are not owner repairs.
Power, panels and what not to do
Safety
A standard household branch circuit is 15 A or 20 A at 120 V, and a large-appliance circuit is typically 30 A or higher at 240 V. Do not keep resetting a device that trips: it is protection working.
Where the owner side ends
There is no owner repair on this page. The split is simple: the circuit trips without the machine, call an electrician; it trips only with the machine, call an appliance technician. Either way it stays off until then.
Nearest pages of this class
Generalized information — and what is missing from it
What this page does not cover: model-specific figures, part numbers and service sequences for any single Café family — it describes how a built-in dishwasher behaves as a class. Where a more specific page exists for your unit it is linked below and should be read first.
Links: - [Common Café Dishwasher Problems](/blog/caf-dishwasher-problems) - [Café Dishwasher: Abnormal Noise or Vibration](/blog/caf-dishwasher-abnormal-noise)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
