Window brakes

If the window slams shut, then the issue lies with your balances.

I see that your window uses spiral balances. These can actually be charged to give them a little more tension. You need a charging tool like our 75-006. The video guide below will show you how this can be done.

If you charge your balances and it makes no difference in tension, then they are broken and will need to be replaced. Get back to us if that's the case and we can assist you.