Lockfit specialise in Upvc doors. If you experience problems with your uPVC door and are not familiar with uPVC door locking mechanisms it’s recommended to call a locksmith and do not extract the locking mechanism by yourself.
There are several different manufacturers that make UPVC door locks and mechanisms. Whilst there are many different variants and designs, they all work using the same essential principle.
The kind of lock known as a “multi point locking mechanism” is not unique to uPVC doors: it also sometimes features on wooden composite doors. When this device malfunctions in the closed and locked position, it can lead to other issues.
Usually there are tell-tale signs that the system is going to malfunction.