How To Fix A Door That Won't Latch Shut. Add a comment step 2 using a phillips #2 screwdriver, loosen and remove the two screws holding the striker plate in place. If that doesn’t solve the problem, try this trick:

Reaffix the exterior knob and screw the interior knob back into place. To lower the latch, do it at the bottom hinge. If it lifts up even a little bit, then it means that your cabinet door hinges are loose.
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While You Are Checking The Hinges, You Will Want To Check The Nearby Springs.
All you need to do is rotate the thumb a couple of times to position the spindle correctly. Check the top of the door. Unscrew and remove the strike plate realign the strike plate, but do not move it down too low where the screw hole overlaps the latch hole.
It Is Actually Very Easy To Adjust The Spindle And Align It With The Door Latch.
In most cases, this should be enough to get the latch working again. This is the most straightforward fix and thus should be the first thing to check. To fix this, follow as:
Sometimes It Helps To Pull The Door Handle While You Try This.
If not, then move to the following solutions. If it latches securely, the problem is solved. However, this fix will help any causes of a door not having sufficient clearance to latch.
To Fix The Hinges, It’s A Case Of Using The Classic ‘Pack It With Cardboard’ Approach.
Click to see full answer. A short term fix is to move the strike plate to align better with the stuck door latch. Then, using a small brush, scrape out all of the nooks and crannies and wipe everything down before putting it back together.
Slide The Latch Mechanism Back Into The Door.
Step 3 enlarge the strike plate hole Step 1a move door side to side grab the door’s sides and gently move it side to side while looking at the hinges. To do this, mark the point on the door frame where the latch lands.