Give the screw a clockwise turn and test to see whether the door slides easier.
Sliding door lock jammed shut.
Soak your door lock in kerosene for 24 hours if it isn t attached to a door and has been rusted shut.
Drill around the barrel with a 3 5mm drillbit and perforate the plate then you ll be able to get the door open.
Check the alignment of the deadbolt against the strike on the jamb if the lock is difficult to turn when the door is closed or the door doesn t lock at all.
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Remove the cover or faceplate.
Most sliding doors have a mechanism called an adjusting screw located at the bottom of the door ends.
The mechanics of the lock have broken leaving the top section of the door completely.
If the door becomes even harder to open turn the screw in the opposite direction.
If the sliding door on your van is hard to open and close or if it feels like the door of your van is stuck when you open and close it you can fix the stuck door by oiling the rollers.
Sharply tug the extractor away from the lock to remove the key.
Use a file to widen the hole on the strike or remove the strike with a screwdriver and reposition it on the jamb.
Well you could always drill the lock out if you don t want to get a locksmith in.