If you are capable of doing this work yourself.
Adjust door closer strength.
If there is just one screw on your door closer turn it clockwise to increase the speed with which the door closes.
The latch speed is the last 15 or so of closing.
Turning the valve clockwise will cause the door to latch slower and more gently.
Most door closer brackets have slotted holes so you are able to slide them left to right to make adjustments without.
Storm doors have a connecting pin that can be set into two separate slots to change the tension on the door.
This video shows you how to adjust the tension on your automatic door closer.
Latch speed valve valve 3 as specified in instructions controls the latch speed of the door 3 32 allen wrench.
Adjust the force with which the door latches or swings from 15 degrees to fully closed by changing the latch speed.
Turn it clockwise to reduce the speed counterclockwise to increase the speed.
To adjust the latch or sweep speed.
Remove the plate to inspect the door closer body for leaks see below if adjustment holes had not been drill during the original installation measure where the adjustment screws are located.
Turn the screw marked with an l counterclockwise 1 4 turn to increase latch.
If none of these adjustments works then your door closer may be worn out and you will need to buy a new one to replace.
Replace the plate and if necessary the door and you.
Insert a 1 8 inch allen wrench or screwdriver in the appropriate set screw.