That s the small rectangular brass plate on the jamb that the striker slips into.
How to fix door lock on room door.
Locate the screws holding the lock in place on the inside of the door.
The striker plate is.
Remove these screws unscrew one side of the door knob and pull the door handle and lock assembly out of the door.
Tighten the hinge screws and then try adjusting the strike plate by loosening its screws and shifting it slightly.
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.
Do not over tighten the screws or you may strip break them.
If not there is more to look for.
Remove one of the screws on the jamb side of the hinge and drive in a 3 in.
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If it won t lock open the door.
Examine the striker plate.
If you break off a screw head or strip it use an inexpensive device called a screw extractor to remove it.
Tap the end of a chisel under the door stop on.
Try using some graphite powder in the lock.
Repairs range from making minor latch adjustments to repositioning the door.
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.
In most cases the problem is now fixed.
A sticky lock can be annoying.
Remove the old lock.
Loosen the knobs a little to relieve some of the pressure on the door and to free up the latch a little.
If it latches securely the problem is solved.
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After squeezing the powder in use your key a few times in the door to get the lubricant spread to the components.
Slide the latch in and out to see if it moves smoothly and if not the door knob may be too tight.
If that doesn t solve the problem try this trick.
Tighten the screws that go into the door and the screws that go into the door frame.
How to fix a door that will not lock.
This serves as a great lubricant for locks.