If your upvc door won t lock even when still open this is usually because of the following reasons.
Multi lock door wont lock.
This is the kind of door hardware that runs the entire span of the door frame and engage.
Upvc gearbox failure or multipoint lock damage.
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.
Key will not work if you ve had a new spare key cut recently it could be a poorly cut key causing the problem.
Mul t lock is the worldwide leader in developing manufacturing and marketing high security products and access control solutions.
On doors where there is a multi point locking system this can be a sign that the system has been worked too hard.
A slip of a cog or a broken spring maybe.
Multipoint lock is damaged.
Lift the handle turn and remove the key step 1 close the door.
Upvc gearbox failure most common.
Step 2 lift the handle.
Problem with lock cylinder.
Upvc door won t lock even when open.
It can also indicate the cam has become worn.
If the locking mechanism is an all in one then you have a problem within the bottom mech box which holds the bottom hook.
This is the first time i ve ever worked on a multipoint lock system.
Have you had a new cylinder fitted.
If you can t get the bottom hook up by sliding something in and pushing up then the teeth or a slipped cog is in the way and your probably not going too.
Door lubrication is required.