Upvc gearbox failure most common multipoint lock is damaged door alignment issue problem with lock cylinder door lubrication is required.
Upvc door will not lock.
The mechanism can also be to blame when it comes to your upvc door not locking.
If your upvc door won t lock even when still open this is usually because of the following reasons.
The locking mechanism runs across the entire length of the inner face of the door.
This will cause only further damage and make repairs harder and costlier.
If you have any lock mechanism issues it s best to leave the repair.
Look on the side where the handle is you will see packers on the top and sides try and get a couple of packers and lift on the handle side about 3 4mm and if the door will lock then make sure you don t use anything metal to lift the door and check to see if any packers have slipped down the side of the glass.