Complete evaporator pull and clean. Remove evaporator coil from air handler. Wash coil off with water, apply cleaning products to the coil and rinse one final time. I gave the coil 15 minutes to dry in the sun before re installing. Re install coil in to place. Pressure test system with nitrogen to ensure no leaks. Vacuum the line set down to 500 microns to ensure no moisture or non condensable material left in the line set. Cycle and inspect equipment. Unit is operational.