Loose balance spring

Thanks for posting! The balances in your window are likely sitting in the window, as shown in the photo, because the top sash guides need to be replaced in addition to the balances. I'm happy to identify replacements for both the balances and the top sash guides but I'll need details from both hardware parts to confirm the correct replacements.

For the guides, I'll just need to see a front profile and side profile view to get an idea of the shape and how it installs to the window sash. To identify the balances, I'll need to see a photo of the top and bottom attachments, a photo of the center of the balance where the spring and string meet, and I'll need to know the stamp from the metal channel.

I've tagged a few video tutorials below with instructions on how to repair a jammed window, how to replace a top sash guide, how to remove the balances, and how to identify them.

Please don't hesitate to reach out with any questions.