Approximately twice a day, there's a loud, metallic BOOM from the rear of our coach.
It sounds like someone kicked an aluminum air duct. It seems to do it once in the morning and once in the evening, so I assume that something is expanding and contracting as the day's heat goes up or down. It's hard to tell if the noise is coming from above or below.
At first I figured it was just the gas tank settling, but the noise seems to be getting louder every day, which suggests that something isn't right. This morning it was loud enough to wake us up. Has anyone else experienced anything like this?