Assess the causeFollow the evidence.
Inspect the thermostat or sensor feedback, air damper where fitted, control response and food placement.
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.
Record the selected temperature and which shelves or drawers are affected.
Record the timing, previous work and accessible model label. Do not remove covers or handle live, refrigerant or pressurised components to obtain information.