How To Make A Door Swing Closed
You can tighten the hinges to see if that helps or you can slightly shim the bottom hinge to make the door plumb again.
How to make a door swing closed. Remove the door casing decorative trim around door. Often the door will swing open or closed because the hinge side of the frame was not installed plumb level up and down. Door closers have a pneumatic cylinder which controls the swing speed of the door and a bracket which connects the pneumatic cylinder to the door. There are two ways to fix this problem.
Just last night my daughter pointed out that the bathroom door drags on the floor. Close the door completely and locate the pin that holds the pneumatic cylinder to the bracket. To adjust a door that swings open or closed on its own it is probably because the door lining frame is out of plumb. Put a level up and down ways on the frame and the wall at the hinge area and see.
Slide it up and out to release the cylinder from the bracket. Sometimes this happens because the wall is out of plumb leaning towards the direction that the door tends to fall. Reinstall jamb and door so that it is plumb and level in both directions then. This causes the door to swing open or closed by itself.
Making the door plumb will allow the door lock to engage. Remove the door jamb by cutting the nails behind jamb with reciprocating saw or hacksaw blade. The easiest way to sort this if you have loose pin hinges is to remove a pin knock it out with a nail punch and bend it slightly by hitting it with a hammer to increase the friction then put it back in. I ve hung doors for years.
If the hinges are out of alignment for any reason the law of gravity dictates that the door will fall open or closed swinging on its hinges to reach its lowest point. Hope this helps in the meantime. So i might put together a tutorial on this problem.