This is just a thought which happened to us. If the smell smells like rotten eggs or suphur, I'm assuming that the camper had been winterized and maybe the dealer didn't clean all the water lines. As the temperature get warmer, the pinky stuff sours in the lines, leaving this stinky smell if it's not thoroughly washed out. We thought we had cleaned all the lines in our camper one year but we had this smell. It was worse in the bedroom area which didn't make any sense. Yes we had run water thru all the line at least we thought we had. Bingo, we forgot about the washer uphook in the bedroom. After attaching a hose and running water thru both hot and cold attachments, the smell went away. It's just a thought