Assess the causeFollow the evidence.
Assess door sealing, moisture entry, defrost heater and sensor operation on models that use automatic defrost.
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.
Photograph the frost pattern before it melts; do not chip ice with sharp objects.
Record the timing, previous work and accessible model label. Do not remove covers or handle live, refrigerant or pressurised components to obtain information.