This Bounder is new to me, so I haven't run the AC before. It has dual A/C units with dual controls.  What puzzles me, is that when I turn on the rear AC unit, it will blow air out of the front ceiling vents as well as the rear vents.  The rear vents will put out cool air but warm air out of the front vents.

  Do the vent channels communicate on this coach?  I know the units may need to be recharged, but want to sort to this out before I went go to the expense of taking it in, as I'm a full timer.

Thanks ahead of time.

Rod