If the locking mechanism is an all in one then you have a problem within the bottom mech box which holds the bottom hook.
Multi lock door wont lock.
Upvc gearbox failure most common.
Step 2 lift the handle.
Key won t turn in lock i couldn t get my mail so i tried something whilst the camera was rolling and it was almost a miracle result.
Upvc gearbox failure or multipoint lock damage.
Have you had a new cylinder fitted.
Key will not work if you ve had a new spare key cut recently it could be a poorly cut key causing the problem.
Warping if the door cannot physically lock due to the frame or door being warped an adjustment of the strike plate could rectify the problem without the need of a new lock.
On doors where there is a multi point locking system this can be a sign that the system has been worked too hard.
Multipoint lock is damaged.
This is the first time i ve ever worked on a multipoint lock system.
Problem with lock cylinder.
If your upvc door won t lock even when still open this is usually because of the following reasons.
Door lubrication is required.
Lift the handle turn and remove the key step 1 close the door.
Upvc door won t lock even when open.
It can also indicate the cam has become worn.
This is the kind of door hardware that runs the entire span of the door frame and engage.
How to free a stuck lock.
This problem with the multi point locking system can develop over time until the lock suddenly stops working.