Simply use a hammer and screwdriver to remove one of the hinge pins and bend the pin by laying it on a hard surface and hitting it in the center with the hammer to put a slight bend in it. The bend will cause enough friction in the hinge that it will keep the door from falling further open or closing by itself.
The first thing you should try is tightening the hinge screws. In most cases, it is the screws on the top hinge that will need the tightening. If the hinge screw holes are stripped, try using a screw with a larger diameter or longer length.
Gravity: If the door is not accurately vertical when it is built (most masons use a gravity-based string line to check how vertical things are - it's called a plumb line), it would swing by itself due to its own weight. The door frame is probably tilted a little bit towards the side it opens on.
Check the power supply and wiring
Another possible reason for automatic doors opening and closing on their own is an issue with the power supply or wiring. Check the wiring and connections to make sure they are secure and free from any damage or corrosion.
Stuff a sock into the gap between the door and the frame to create a temporary lock. Doing so creates enough friction to hold the door in place. While this method is not the most secure, it can be a quick and easy way to add some resistance to a door that needs a lock.
Leveling the hinges might just be how to fix a door that will not stay open. To do this, insert a shim between the door frame and the hinge. Then, remove and replace the hinge screws, making sure each is tight and snug. Once all the hinges are in place and level, check to see if the door will stay open.
A door stop is a useful tool for keeping doors in place and preventing them from swinging open or closed. Along with its main purpose, there are other uses for a doorstop such as keeping intruders out. Door stops come in various shapes, sizes and materials, ranging from metal to wood to plastic.
Several factors can contribute to a door closing on its own: Worn, loose, or ill-fitting hinges. Door deformation due to humidity or age. Imbalance resulting from incorrect installation.
Choosing the correct and sturdy door hinges is the best way to stop the door from opening. Besides this, you can install a standard deadbolt or choose a double-cylindrical deadbolt. You can also consider installing a three-point locking system.
The cause for the phenomenon is simple: The door jamb is out of plumb. The jamb may have been installed in an out-of-plumb wall, but that's not always the case. In my own home, I installed a door that closed by itself even though the wall was perfectly plumb. I'd made that door in my shop from old Douglas fir 2x6s.
A door stop works well. There are also stops that fit on a hinge pin, forming a right angle, adjustable to keep an obtuse angle between the door face and the trim. Old fashioned screen doors would have a light chain fastened to the door and jamb that goes taut when opened.
A: Door hinge pins aren't universal. The manufacturers of door hinges make replacement pins that are specific to their hinges. Pins for hinges vary by length, finish and diameter. Using the wrong-sized pin for your door hinge can affect the performance of your door as well as the appearance of the hinge.
Use a Doorstop
Doorstops are typically used to prevent doors from closing, but when a doorstop is placed behind an inward opening door it physically prevents the door from being opened, even if the doorknob can be turned. It's a simple, effective method to help secure the home when the door lock is broken.
If it's not a draught, maybe it's the hinges. If they are loose or out of alignment, the door won't stay shut. Check to see if the hinges are lined up by using a level. Grab a screwdriver and make sure the screws on the hinges are tight.
Fork Lock: When in need of a quick makeshift lock, you can fashion one by bending the prongs of a fork to fit snugly into the latch hole and handle. This DIY solution effectively secures the door from the inside, offering temporary protection against unauthorized access.
When your college roommate places a sock on the doorknob, it's a nonverbal warning that you should avoid entering because they are in the middle of having sex and don't want to be interrupted.
A penny - wedging pennies between the door and the frame can be very effective in preventing a door from opening. However, if it's done properly the only way to get out is to remove the door from its hinges! Not the most sensible solution to security.
Roll up an empty plastic water bottle until it fits well in the gap between your door and the floor. This will keep your door wide open for you to enter and exit as needed. Cardboard Stop: Fold up some cardboard and shove it under the door to keep the door open. Now your door will stay propped open.