Photos include model information of vinyl window, normal spring on right, and damaged spring on left track

Question

I am looking to purchase a replacement spring for left track of window and, if possible, DIY instructions.

Tom · Accepted Answer

Looks like you need a new coil balance system, but I cannot identify what you have based on these photos. In order to narrow down the list of possibilities, I will need you to remove an undamaged version of this assembly and show me a few clear photos of it without obstruction. Please let me know if that would be possible.

In the meantime, the associated video may be of help to you.