A friend of mine has an old UPVC back door that won?t open.
It?s about 15 years old and has the standard style of lever handle with a very narrow plate and a Euro cylinder lock set into it. You can turn the k ey in the lock and feel the lock?s bolt go in and out but you can?t mov e the handle ? which is what I presume makes the multiple bolts down the side of the door retract.
I suspect it may be time for a new door but in the meantime I?m wondering what the best way is to approach this as I am not familiar with these mech anisms and their peculiarities and we?d like to be able to open the door for a few last times before we get a new one!