Rain through the refrigerator vents seems to be a common occurrence for some owners. I had read about the issue before buying our Bambi Sport, and it took less than two weeks for mother nature to give me my own private experience. We had a monster rainstorm come through with high wind and nearly sideways rain a few days back and it basically rained directly inside the external vents of the refrigerator compartment which then made its way into the interior and eventually across the floor. I just happened to go look in there after the storm to see if anything had leaked since the trailer is new which is when I found the puddle.
After wiping out what we could and toweling the inside floor I set up a fan outside the refrigerator compartment as well as inside including under the dinette seat where the fresh water tank is located (the plywood in there had soaked up a bit of water as well).
Fast forward to this morning...here comes the rain again.
To try and prevent the issue from happening again I quickly cut out two rectangles of plastic sheeting I had from a recent remodel project and sandwiched them between the vents and the frame to keep any further rain out. They seem quite snug and I imagine they will work well (just gotta remember to remove them this weekend when we head out for camp).
Afterwards I bit the bullet and ordered two of the stainless steel refrigerator grates from Airstream pictured below (their image, not mine). My wallet didn't like it much, but I expect I will be very pleased with them. The look they they should do a better job of keeping rain out as well. They should arrive early next week and I'll get em installed and report back on how it went.