Has anyone tried to put a window AC unit in there pup? The one that was in my pup died and i figure try a window unit. well took old unit out got the window unit in and fired it up started to cool then started blowing hot air. I have a 1998 Skamper and the AC in in the side it isnt a roof unit. And if i take window unit out and plug it in it cools real good just not in the pup.