I live in a 100+ year old factory building that was renovated in the late 70's to early 80's and turned into condos.
My windows have all run into the same problem. I hear a snap and the twang of a spring, and they no longer want to stay up.
The windows are wooden double hung sash. There is no readily visible manufacturer label on them. After a few ups and down a sash cord of some sort has appeared, but the system itself is contained and not visible without disassembling the window. Possibly contained in the vinyl track.
Does anybody have ANY advice for me as to how I should approach this problem? Where do I begin to take the window apart? I'll try to take some pictures and post them later for clarification.