Constantly Rising High Pressure on Greenstar 30i ERP Combi

Customer advised that the pressure on her boiler, keeps going up and near 3Bar,even with the boiler OFF Or Not being used.
This is quiet a common issue with Worcester's KEYLESS filling Link assemblies and is caused by high limescale content in Mains Cold water, which restricts the spring's movement (behind the blue Lever). Causing it to stay Permanently open and Constantly but slowly, fill your boiler or heating system.
This can be resolved usually by replacing the complete filling link. But that would require the heating system to be drained down as well. A much efficient and quicker way, shown In this video, is by just by replacing the spring mechanism on the link. Watch the video for detailed process. Thanks