Replacement window balancers

See our S351-35 or S390-35. The only difference between these two balances is the 'depth' of the bottom nylon shoe. The Series 351 has a shoe with a 1" depth, which seems to match what you show; but it's not reliable to read pictures of measuring tape, so I'd double-check this for yourself to be safe. In either case, you'll need a stamp option of 3430.

For the weatherstripping, it depends how it installs; some weatherstripping is kerf-mounted, in which case it snap right in and out; others have a T-Slot base, in which case removing them can be a bit trickier. See the video below for details. Ultimately, identifying the correct weatherstripping replacements comes to the end profile dimensions. See our selection here. 

As far as removing the upper sash goes, if it is movable and has balances regulating its movement, you should be able to pull it down and remove it just like the lower sash. That said, if it will not pull down, then there may be nothing that you can do. In some windows, the top sash is stationary and is not meant to come out. This may be one of those times. You still may be able to replace the glass, though. If you're up to the task, you would first remove the vinyl glazing snap in that surrounds the glass, and then with our 75-052 tool or a utility knife, you'd cut away the sealant holding glass to frame. Of course you should be very careful as to not hit or damage the glass. I recommend wearing gloves. If in doubt, hire a professional. 

To be honest, before you even attempt this, I should note that fogging glass is a sign that the molding around the glass has been compromised. A local glass shop should be able to help you repair this molding, but this also is dependent on whether or not you can remove the entire sash from the window. Again, you'll want to determine this first or hire a local professional before proceeding. Hope all this helps.  

My pleasure. Let me know if you have any other questions. Thanks for reaching out, we appreciate it.