If no one here has had this issue with this model, you might try some of the Roadtrek pages on Facebook. For instance:
https://www.facebook.com/groups/1676...?ref=bookmarks
This is a closed group and it can take a couple days to get approved. There is also a Roadtrek Yahoo group which has many owners of the older units, but it can take up to a month to get approved.
Sorry I can't help.