Vibe = travel trailer. You live in it. Did a dealer deliver it and set it up? If so, that dealer can come out and fix (replace) whatever needs replacing. For a 2016, I would think definitely under warranty.
If you drove it out to where you live (towing it with a truck) then I think you have 3 options:
1- Get it hooked up to a truck and take it to the dealer
2- If you KNOW it is the converter, get someone who knows how to use a multi-meter and check things out or,
3- If you KNOW it is the converter, buy another one. Parallax 55 Amp $207 on-line.
Whatever it is....g'luck!