We are having issue with black holding tank within a day it registers full and turns red and no longer will flush. I think its a sensor issue and we have taken it back three times now I need to know what the problem could be? Also the Aqua hot does not stay hot a short shower drains the hot water this is also the second time we are addressing this issue. All the minor issues have been addressed and fixed. The dealer has been great this is my fourth coach and Holland RV has by far been the best dealership with the best service. I love the coach it drive by far better then any of my other coach's I'm sure after we work thru these issues we will many year of great RVing.