Several questions and then "maybe" some ideas?
Stepone is to try to avoid more damage from freezing. I looked at your info and see Florida but I'm guessing that is not where you are to find that temperature?
So what does the weather for the next week look like? You really, really need to either get the RV to warm or get heat to the rest of the pipes as 14 degrees will really put the hurt on lots of things if you are not prepeared!
Then there is the question of where and what is broken. By cabinets, I suspect you mean the outside lower compartments that we often call the "basement"? And it sounds like the leak is in the "wet bay"?
If that fits what you have, I can give some small pointers, maybe?
One is to point to info on the online plumbing info here:
https://www.winnebago.com/Files/File...p39k_plumb.pdf
But I snipped a couple small pictures for what you may find. If it is the wet bay where water is first comming out, that is kind of a "normal" place to freeze as parts aresticking out through the metal faceplate and get colder as any heat at all is behind the plate?
So taking a look at page 8 it gives the front view and seems to show there are screwsalong the edges of the plate. Sometimes it is possible to pull these screws and gently work the plate and tubng forward enough to get to the back side, sometimes not and we have to take several of the fitting sn such off the plate to remove it.
You will just have to look and see how it works out???
Page 8 gives a rear view of this wet bay plumbing for an idea of what amount of plumbing is there as it is pretty much the heart of things for water!
Try clicking these snips to get a betterview or go direct to the info above to get more and better info!
If you find a part that is broken, it doesn't have to be a specific RV part to replace it and many of the parts can be replaced with something from the local hardware store. Usually cheaper and faster to get it there!