Norcold door won't stay closed during travel?

We have a new 2013 Landmark Key Largo with the Norcold 4 door frig and we are new to RVing. On our first trip one of the frig doors came open during travel going and returning from the campground. I am pretty sure we heard the door click when we closed it prior to travel. Any suggestions on how to secure the door? It seems to be locked but flexing during travel must cause it to open.

Until you get it fixed right (under warranty), I suggest a duct tape or Velcro external fix.

Walmart, ToysRUs, Target and lots of other stores sell something like this. I would prefer that over duct tape. It should be removable also. (Google child safety fridge latch)

http://www.amazon.com/gp/aw/d/B00068O250