Inspect unit for proper refrigerant level and adjust if necessary
Clean dirt, leaves and debris from inside cabinet
Inspect base pan for restricted drain openings—remove obstructions as necessary
Inspect coil and cabinet—clean
Flushing the drain line out
Pulling and cleaning blower assembly
Put ant repellent in electrical box to ants out & your unit running all summer long
Inspect fan motor and fan blades for wear and damage—on older models lubricate as needed