2005 Hyundai Tuscon Coolant temperature overheats

I recently replace the thermostat and checked the fan they are both in working condition car tends to over heat while driving when it does so i turn ac on full and it cools if im at idle and i turn ac on it begins to work for a few seconds then gets warm and the engine coolant temperature goes up to about 205-215 i even flushed the radiator and filled with fresh 50-50