Performed tuneup on AC system. Inspected indoor and outdoor coils, flushed drain line, inspected blower wheel, checked static pressure, checked temperatures, checked refrigerant pressures, inspected all major and minor electrical components. Found heavy amounts of biological growth inside air handler along cabinet, Evaporator coil, and blower cavity, also compressor has very high startup amps and is low on refrigerant. Gave client options for repairs, however, system is 10 years old and recommend replacing due to age and cost of repairs. Client decided to replace the system at this time. Installing new system on Monday May 5. Client paid 50% down for install and signed them up for a one year free Mach one member membership.