MW Double Hung Twin Seal Window with L-E Argon
It definitely sounds like you need new balances, though I'm not familiar with what an inverted tilt balance might be. That's not terminology I've seen before. Either way, "tilt balance" covers an enormous variety of different parts, so we will definitely need more of a reference.
To start, estimations will not do in this case. You will need precise measurements and references before you buy anything. These are very specific, very delicate systems and they need to match the original parts exactly. You don't have a lot of wiggle room. It's also not possible to replace the cords; you need all new balances.
That will mean removing the sash so that you can access and remove the balances. Since the window is stuck, this likely won't be an easy project. You should brace yourself for that now. Getting it unstuck should be your first priority, though that is admittedly not something we can help with. That's something that will require hands-on trial and error to figure out.
Once you have the balances out, you can submit photos here for me to review and I can tell you exactly what you need to get the window working normally again.
Thank you! These photos are a huge help. What you have here looks to be a pretty typical S795-28 channel balance. The bottom "T" shaped shoe is a slightly different style, but as long as yours is 1-1/4" wide then it shouldn't be a big deal. What I'm more concerned about is how the balance attaches to the window via the cord; our S795-28 attaches using a screw, but some older windows use a hook. We can make that for you but only as a custom order, since it isn't a stock configuration. Just let me know.
As for the nub you mentioned, that appears to be part of the pivot bar. Its function is exactly as you described. Would it be possible to see the rest of it? There are a ton of different pivot bars compatible with the S795-28 and I don't quite recognize this one, but I feel confident that I will once I see the whole thing.
Thanks for these photos. I hate to say it, but that hook at the end of the cord does mean your balance has to be custom made. There's no way around that, unfortunately. If that's something you want to try, I will need to know a quantity. Then I can email you a purchase link and price quote that you can use to add the custom balances to your cart.
As for the nub, that is definitely the pivot bar. I am confident I can ID it for you, but I really do need to see it removed. It's up to you if you want to try to replace the whole sash, but that seems like a serious solution for such a small part. They just screw on and off, it shouldn't be much trouble to remove it at all.
We don't have a video or diagram that shows a pivot bar installed, unfortunately. If you look at the bottom of your sash it should be self-evident.
What I can do is grab a photo from an old customer discussion that shows what yours might look like. Just note that this is a purely random example. I have no idea what your pivot bar is so I don't really know if it works the same way. The Series 795 is compatible with a ton of different kinds, so you're the only person who can really say for sure how your pivot bar installs. 99% of the time it's like the image you see below: just a piece of metal that screws on. There's usually nothing else to it.
For now I will email you a purchase link and price quote that will let you add 2 of these custom balances to your cart. You can then checkout as normal.
