The issue
A mechanism fault can make a door difficult to operate or secure without meaning the complete door needs replaced.
A supplied Premier UPVC example of door-mechanism work where the failed component can be repaired or replaced like-for-like.

This page expands one of the supplied Premier UPVC work examples so you can see the job in context and follow through to the relevant service.
A mechanism fault can make a door difficult to operate or secure without meaning the complete door needs replaced.
The supplied example shows the mechanism as the repair focus, with repair or like-for-like replacement of the failed component.
The repair-first objective is to restore smoother operation and security while retaining the rest of the door where it remains serviceable.
Send a photo, postcode and short description. Premier UPVC can then identify the most useful next step.