We just bought our first camper van, a Roadtrek 2010, Popular 190. Sometimes while we're driving we hear a "doorbell " ring. Sounds just like a doorbell going "ding-dong-ding-dong". Chatted with Roadtrek people and they don't know what it is. Nothing in manual. Anybody know?
When it happens, do any lights go on in your control panel? It sounds like a seatbelt or door ajar warning. Could be the sensor or connection is bad so it only activates sometimes.