Customer complained about system not cooling properly. I saw that the outside unit was missing armaflex insulation, and low voltage had a splice covered by electrical tape and not covered by any conduit. The inside had a lot of water underneath the unit. It appeared to me that the coil had frozen over and thawed out. The filter was dirty and had water on it. I changed the filter, put some makeshift insulation over the suction line, and cycled power off and back on. The pressures showed that the unit was also overcharged. I got it down to a 10 degree sub cool. System is running properly. Had a 4 degree temperature drop upon leaving.