During the inspection of the air conditioning system, all parts should be checked to ensure it is working efficiently. The inspection should include examining the outdoor cabinet, refrigerant lines, the indoor unit, and ductwork.
Examine the compressor/condenser unit. Note the presence of an electrical disconnect, clearances around the unit, the condition of the cabinet and fan blade, whether the cabinet is level, whether the refrigerant lines are kinked or damaged, and the insulation on the lines.
Original Youtube video here: Air Conditioning Maintenance