#1 a/c only produces 55 degree cold air not 41 . I work with a/c systems. I know for a fact that washdc/md area is quite humid and if you run a/c using outside air the cooled air is not at its maximum efficentcy. you must run a/c using re-circulated interior air (the button with the arrows) . if the a/c unit is still not cooling (stick a pocket thermometer in the vent it must measure 55degrees). if not, them you may have issue with either the hot gas valve not opening or a compressor issue (the clutch is not engaging).