Upon arrival customer showed me an ac unit in the attic that needed tuned up. The evap coil is clean. Found microbial growth in air handler recommend a pure air x and customer Denied at this time. Cleaned the condensate with solvent and shop vac. Checked the system for proper amps and volts. Went to the condenser and Checked the system for proper amps and volts. Recommend to customer to start thinking of a new Ac due to age.