Assess the causeFollow the evidence.
Inspect the latch, lock mechanism, wiring, water level and control release conditions.
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 water is visible and whether a lock symbol or error remains on the panel.
Record the timing, previous work and accessible model label. Do not remove covers or handle live, refrigerant or pressurised components to obtain information.