Assess the causeFollow the evidence.
Check supply, programme selection, delay or child-lock settings, door/lid lock and the start-control circuit.
The exact model and operating conditions determine which tests apply. These are possible inspection directions, not a list of components that must be changed.
Before the appointmentKeep the useful details.
Tell us whether the panel lights up, the door locks, or the machine gives a beep.
Record the timing, previous work and accessible model label. Do not remove covers or handle live, refrigerant or pressurised components to obtain information.