Assess the causeFollow the evidence.
Assess airflow, filter and coil condition, fan operation and the refrigerant system as applicable.
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 visible ice without removing covers; report how long the AC runs before it appears.
Record the timing, previous work and accessible model label. Do not remove covers or handle live, refrigerant or pressurised components to obtain information.