Upon arrival for bi annual maintenance the customer complained of a small water leak under the closet unit. After a quick diagnosis we discovered the p trap and some other fittings were not glued. We glued the fittings in and set the drain to a better elevation and blew out drain. Some water damage in the return box under unit. (Duct board insulation was wet and tattered.) Recommended a full repair to the customer and gave her a quote. (Approve) Continued with the cooling evaluation. Checked the temperature difference inside which was 19°. Checked pressures outside and got our sub cool and superheat. Washed down outdoor coil and unit. System operating to manufacture specifications.