Seasonshield Windows

Hi Jim, I think we can help! It sounds like you need new Top Sash Guides. These are the nylon caps in the top corners of the window sash that keep the channel balances in place. Sunlight and age can cause the Top Sash Guides to weaken and eventually crumble; when this happens, the balances shoot past the sash into the top of the window tracks, just like you're describing. If the Top Sash Guides are all that's broken, then no, you may not need to replace the channel balances at all. 

Now, these guides can vary from window to window, so the best way to know which you need is to produce an undamaged one and show us 'mugshot' pictures of it from the front and side. From there we'll do our best to narrow down what you need. Personally, I'd recommend replacing the guides first. If the windows still don't work, then the channel balances might have also failed. In that case you're going to need either our S351-30 or S390-30; just confirm that the length of the metal channel, not including the fittings on either end, is 30". To determine which series is correct for you, just measure the depth of your bottom plastic shoe attachment. If it's 1", you'll need the Series 351 but if it measures 1-1/8", you'll need the Series 390 balance. For either series, you will choose the 2930 option as determined by your "2930" stamp.

Comparison of 15-001 & 15-002

Also see the video below that shows how to remove and replace Top Sash Guides. Let us know if you have further questions!  

Thank you! This looks very similar to our 18-127. Many customers with Seasonshield windows have used this as a replacement, as well. Please compare it to your own and let me know what you think.