(Difficult to Open Example):
I couldn’t open the window, it was stuck, jammed and seized shut. The window handle moved, but the window just won’t open?
When you close the window, the gearbox (which is attached to the handle) pushes shootbolts (espag or espagnolette) and roller cams (mushrooms) out to lock the window in the outermost corners. Parts of the gearbox can break, or the shootbolts can seize preventing the window from opening….
The main thing when ordering parts, is to compare the new part with the original. New parts may get modified as they improve and evolve (you would hope), but some key things should stay the same. For instance, the size and position of fixing holes (the part has to fit in the original position and the fixing holes need to be the same).
So, measure the size of your old parts, the position of fixing holes and the type of connections (how the other window parts may attach to the replacement part).
When ordering gearboxes, you will often see quoted “A 9.5mm, or 11.5mm latch and 20mm, or 22mm backset is available”. The image below gives an example of a 11.5mm latch with a 22mm backset. Therefore take care when measuring these particular sizes.
Ordering Parts – Examples of What You Can Buy:
Can be found on this page: How to Open a Jammed, Stuck, or Seized uPVC Window: (Opens in a new window / tab)