Step 1 if the key turns but does not operate the lock bolt the lock mechanism is broken.
Rock door lock problems.
Faulty mechanism mechanisms on composite doors are.
Like a medical problem this is what we call a symtom.
Faulty euro cylinder the door furniture and hardware on a composite door is practically identical to a upvc door so.
The tolerances on doors and hardware is fairly narrow.
Remove the mechanism to have it repaired or replace the lock set yourself.
These difficulties fall into two general categories.
Door hardware only works properly on a door that is aligned the way it should be.
If the latch does not catch close the door slowly to watch how the latch bolt meets the strike plate.
Warped door it is a rare occurrence but composite doors can sometimes warp.
Repairs range from making minor latch adjustments to repositioning the door.
Door lock problems are mostly mechanism issues and sometimes they become faulty through wear.
Tighten the hinge screws and then try adjusting the strike plate by loosening its screws and shifting it slightly.
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.
Also a broken bolt or latch that causes your door lock to jam might be a symptom of a much larger issue like an attempted home break in.