Complete evaporator coil replacement. Remove evaporator coil. I rinsed the evaporator coil off before using chemicals to remove all dirt, dust and debris then rinsed the coil again. Re installed evaporator coil. Pressure test lines with nitrogen to ensure there are no leaks. Vacuum the system down to 500 microns to ensure no moisture or non condensable material is left in the lines. Cycle and inspect equipment. Unit is operational. All pictures are in ST.