Window Balance Replacement

The window balances have a plastic rod through the center of a spring that hooks onto an end cap that screws into the window frame. The spring attaches to this plastic end cap by an ear sticking out of the side. There is a plastic slider on the bottom of the spring that attaches also with an ear, and it has a string attached to it that goes to the socket that the window base fits into.

The string has a plastic oval on the end and goes under a couple of fingers on the socket. The channel is covered with a vinyl snap-in cover to keep the plastic rod from sticking out and hindering the window. The windows are double-hung and tilt in to clean. They are a little over twenty years old and I don't know the brand name. Of the twenty-odd windows in the house, all of the most frequently used ones have failed, but the only thing wrong is the balances.