Window balance?

Question

The window will go up but falls down. The window can tilt in but falls off its track due to this broken piece.

Bob · Accepted Answer

Hello there. This piece is called a pivot bar. I am not quite sure which you have judging from this photo, but start by comparing an undamaged version to the 26-125. See if this matches what you have.

Dimensions for 26-125

Alternate image for 26-125