Performed tuneup on AC system. Inspected indoor and outdoor coils, flushed drain line, changed air filter, checked temperatures, checked static pressure, checked refrigerant pressures, inspected all major and minor electrical components. Recommended installing a UV light inside air handler to kill any biological growth buildup, also recommended installing a drain guard, in-line drain cleaner to help keep the condensate drain line clear of debris, and also recommended indoor and outdoor surge protectors. Client not home at the moment, left client voicemail to go over options. Also email client all options. Cycled and tested system, all operations OK at this time.