Vinyl Window Sash Balances are integral parts of a windows functionality. A worn out channel/sash balance can cause windows to not open and close properly or even do damage to the vinyl frames. If you are experiencing difficulty operating the movable section of your window frame, be sure to check your balances and see if they may be getting worn out and in need of replacement.
When replacing channel balances, always use cation and make sure both sides have the same glass size and weight codes appropriate for the window sash it will be supporting. The glass size and weight codes can be found printed or stamped onto the channel balances themselves.
The 3 or 4 digit code is structured as follow: First 2 numbers are the glass size and the final 1 or 2 numbers are it’s weight code. Please reference images for more detail.
WARNING: Always use caution when installing window channel / sash balances.