So I ordered a replacement window system by Pella. Now I'm facing the same problem as the last window and wondering if I should return it. There doesn't seem to be any way to remove the window if I ever need to replace a broken window or replace the balance system. Anyone know how the Pella windows come out? There are NO latches to release the window and it's stuck inside a track.
10 Series Vinyl Double Pane Annealed Single Hung Window (Rough Opening: 30-in x 54-in; Actual: 29.5-

 

That is called a side load single hung. There are take out clips on the left and right sides above the sash. Pull them out with your fingernail until they pop out about 1/4". Then raise the window about halfway. Grasp the top of the sash with your left hand and the bottom of the sash with your right. Then push the sash all the way over to the left. You will notice that the right side is now free and you can tip the right side of the sash into the room, and pull the sash out.

Installation is the opposite. When you reinsert the sash you need to make sure that it is high enough to fit over the balance that is hanging from the takeout clip on the left. Center it, then push it down and push the clips back in.

Don't mess with balances as they hang from the takeout clips. They are like spring loaded rockets and if they come off either you or the window will get hurt.

Instructions are here: (in the section for Thermastar with removable lower sash.)

https://www.pella.com/Documents/pdf/...gles_FINAL.pdf

EDIT: Are you saying that the take out clips aren't showing above the frame when the window is shut?

 

I do see some clips. 2 on each side. They're attached to the frame -- not the window. You can actually barely see one of the chrome clips in the picture I posted.
I think this window has springs. There are no balance weights inside the frame.

On the inside do people ever use drywall instead of wood? And I assume you use caulking where the end of the drywall meets the window? I was planning to do something like this pic i found....
http://static1.1.sqspcdn.com/static/...JEEnhbFQ4qw%3D

 

Like I said the clips are on the left and right sides (of the window frame) above the window sash. The window "sash" is the part that slides up and down.

I didnt say anything about weights. You are thinking about counterweights. "Balance" in this case is short for spring loaded block and tackle balance, which is what you have on your single hung side load window. It has a spring, a cord and small pulleys all inside the back of that balance. (There are also spiral balances and constant force balances but that's not what your window has).

Yes you can do drywall returns if you want. Personally I think it's crappy and not suitable for cold climates... probably okay in Cali though. Drywall returns are mainly a warm climate thing.

You didn't answer my question about the clips... they are not fully above the sash when the sash is shut?

 

The clips: One on either side about 6" from the top of the frame and one on either side in the middle of the frame. Oddly enough the middle clips are always covered by the window. The picture below shows when the clip is most accessible, but still blocked by the window.

 

There you go. Pull the bottom edge of both top clips out (they pull out about 1/4" and stop) then lift the window above that point (likely lifting the sash as high as possible) and follow the directions I gave in post 2.