A door that is sagging may cause the door strike to hit the strike plate to low not allowing it to spring into place.
Troubleshoot door lock strike wont slide.
Try to open the door while it is shut.
Door sagging out of square in frame uneven head margin.
The locks strike plate has to be adjusted so that it lines up properly with the corresponding latch or door lock bolt.
Apply a lubricant to both upper and lower tracks to keep the door hardware clean and operating freely.
From there try some lubricant silicone spray and graphite powder are my preferred lubricants for locks wd 40 will quickly dry and attract dirt.
See the article adjusting door strike plates for directions on how to fix a poorly aligned strike plate.
Place the cardboard behind the strike plate.
Place the top screw in and tighten it slightly.
Realign reshim readjust lockside jamb so door meets weatherstrip evenly from top to bottom.
It s an easy fix.
Donations appreciated click in upper right corner info circle.
In addition to cleaning and lubricating sliding door tracks you want to lubricate the door lock.
Slide the door strike in the opening making sure the back of the strike slides into the small.
You will need to simply take the lock off the door.
Troubleshooting a stuck door latch.
Step 3 place the cardboard.
It did not latch shut.
Realign adjustable strike plate.
If the strike is mounted too rigidly proper alignment can t occur and the lock won t hold.
This creates unnecessary friction as the metal bits of the lock attempt to slide past one another or get out of the way of other moving parts.
The cardboard should be exactly the same size as the strike plate.
Line up the back of the replacement door strike with the narrow opening in the body of the dishwasher.
For some door locks you might need to file off sections of the strike plate for it to fit properly.
This gunk and grime can impede the movement of springs as well.
Unscrew the strike plate and reposition it.
And if it still doesn t work it s probably time to go to the store to pickup a new doorknob.
The best way to lubricate any lock is to disassemble it and use an aerosol lubricant to flush away grime and coat the moving parts of the lock.
If you are operating the lock on ac instead of dc or on half wave rectified dc transformer single diode the lock won t hold.
It needs to spring into the recess in the door strike to keep the door closed.
You can unscrew the door knob and remove both sides then unscrew the latch and pull it out of the door.
Ideally the bolt should rest flush within the strike plate.
The lock won t latch at all.
The door is not meeting the weatherstrip evenly when it closes hitting the top or bottom first.
Adjustable strike plate not properly aligned.
This sliding glass door lock was not working.
