Make adjustments to your storm door closer twice a year when you exchange the screens and glass storm panels. Move the long connecting pin into the forward hole (for winter) or rear hole (for springtime) of the closer each time you change the storms or screens. If necessary, adjust the pressure control screw on the closer as well.
The next time you readjust the screens and glass storm panels in your self-storing combo storm door, don't forget to change the location of the long pin connecting the door bracket with the door closer tube (photo). When the glass storm panels are down, place the connecting pin in the front hole of the closer tube (closest to the door bracket). This increases the closer pressure on the door in the last few inches of travel to ensure that the door latch snaps into the catch. When the screens are down, place the connecting pin in the rear hole of the closer tube (farthest from the door bracket). Now, instead of slamming shut, the door will slow down as it nears the door catch. To increase or decrease the pressure exerted by the door closer, turn the screw controlling the bypass valve in the closer tube. Refer to the instructions on the closer tube's label.