Shut the door and try to lock it.
How to fix door lock on room door.
Remove these screws unscrew one side of the door knob and pull the door handle and lock assembly out of the door.
Examine the striker plate.
How to fix a door that will not lock.
Door lock doesn t latch properly when a door latch doesn t click into position it usually means the latch and the strike plate are out of alignment.
That s the small rectangular brass plate on the jamb that the striker slips into.
Loosen the knobs a little to relieve some of the pressure on the door and to free up the latch a little.
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Tap the end of a chisel under the door stop on.
If it latches securely the problem is solved.
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This serves as a great lubricant for locks.
Tighten the hinge screws and then try adjusting the strike plate by loosening its screws and shifting it slightly.
If the malfunctioning lock is in the door handle there will be at least two screws securing the door handle to the door.
Remove one of the screws on the jamb side of the hinge and drive in a 3 in.
Tighten the screws that go into the door and the screws that go into the door frame.
A sticky lock can be annoying.
Tighten the hinges first if you find that the latch contacts the strike plate too high or too low make sure all the door s hinge screws are tight.
Locate the screws holding the lock in place on the inside of the door.
Do not over tighten the screws or you may strip break them.
Tighten any that might be loose and then check the door again.
If that doesn t solve the problem try this trick.
After squeezing the powder in use your key a few times in the door to get the lubricant spread to the components.
Repairs range from making minor latch adjustments to repositioning the door.
In most cases the problem is now fixed.
Try using some graphite powder in the lock.
If not there is more to look for.
Remove the old lock.
Slide the latch in and out to see if it moves smoothly and if not the door knob may be too tight.