Tune up auburn. Customer said upstairs was not cooling properly. Customer said air was leaking from the casing of the coil and patched with aluminum tape but condensation was not allowing tape to stick very well and was still leaking a lot of cold air. Found the problem to be the condensation was deteriorating the duct board that was surrounding the coil and causing it to leak cold air into attic. Recommend replacing coil and replacing supply plenum to steel casing for coil so no more leaks and replacing duct board supply plenum to sheet metal. Blower wheel is clean. Did not find any leaks on evaporator coil. Filter is clean. Drain line is clear. Outdoor capacitor is within range. Pressures on system are within range.