If the latch does not catch close the door slowly to watch how the latch bolt meets the strike plate.
Rock door lock problems.
Faulty euro cylinder the door furniture and hardware on a composite door is practically identical to a upvc door so.
Door lock problems are mostly mechanism issues and sometimes they become faulty through wear.
Remove the mechanism to have it repaired or replace the lock set yourself.
Step 1 if the key turns but does not operate the lock bolt the lock mechanism is broken.
Like a medical problem this is what we call a symtom.
The tolerances on doors and hardware is fairly narrow.
Door hardware only works properly on a door that is aligned the way it should be.
Those related to the lock set or key and those related to the door s frame and latch assembly.
This can make the door difficult to close.
Tighten the hinge screws and then try adjusting the strike plate by loosening its screws and shifting it slightly.
These difficulties fall into two general categories.
If a door is sagging the lock will not latch correctly.
Faulty mechanism mechanisms on composite doors are.
Door lock problems that are a result of debris jamming up the keyway should not be ignored because they can potentially result in more problems like breaking a key in a lock.
Repairs range from making minor latch adjustments to repositioning the door.