This means that there are a few points of failure when it comes to diagnosing the issue.
Upvc door will not lock.
If your upvc door won t lock even when still open this is usually because of the following reasons.
Make sure adjust all of your upvc door s hinges otherwise it still won t close and lock properly.
This will cause only further damage and make repairs harder and costlier.
Upvc gearbox failure most common multipoint lock is damaged door alignment issue problem with lock cylinder door lubrication is required.
Takeaways don t try to forcefully lock or close the door.
If you have any lock mechanism issues it s best to leave the repair.