I have double hung windows with top sash falling down when unlocking. I figured I’d prob need replacement on the channel balance, but I’m not sure how to take the sash out of the frame. All I can find online is the ones with latches, which my sash doesn’t have. Here are the pictures
As you can see, it has two double-hung side by side, and the center seems to have been painted over. Im wondering if I need to cut open the center? The make of the window is PRIMECEL but cannot find any information online. The place is built in 2001 and I believe the windows have never been replaced.