Pumped refrigerant into the condenser. Pulled the indoor coil out of the air handler and proceeded to take it apart and clean it. Once cleaned, we put the coil back into the air handler and reconnected the copper and drain line. Replaced the inline filter dryer, pressure tested with dry nitrogen and pulled a vacuum on copper line set. Released refrigerant back into the system and checked operation of the system. Cleaned the return grille to allow proper air flow.