What ??
I have a 2014 33.2 and had the 2 smaller back bedroom windows start to break down, or should I say that the seals were gapping open on the bottom.
I called Herr company and they sent me replacements free, and as I recall I promised to not send them a bill for labor. Sounds like a deal to me! The Herr folks were very pleasant to me. These windows do not come as a whole unit, just the glass (both panes sealed, etc.). They sent replacement hardware but I didn't need the parts as I used the old cranks, etc. as they are already installed. Whoever said the entire unit must be replaced is wrong.
They are relatively easy to change but one has to drill out a small rivet in the top track so the old window can slide out along the top track. The windows are a little heavy but I did the repair with ease. Buy the way Herr made the windows on their line and I had them in a couple weeks or less.