FWIW I checked my trailer's roof after a heavy rainstorm this past summer and was surprised to see a "pond" of water behind the fridge roof vent
. I'd estimate close to a 1/2 gallon of water had pooled and was just sitting there. I re-positioned my ladder on that side of the trailer and used a tube of Dicor to fill in the low spot and then made an inverted "V" going up the roof so any water running down the roof crown would now be routed past the vent area and down into the gutter system. I don't know why I looked on the roof in the first place as I had no leaks inside but I'm sure glad that I did - I also plan on continuing it as part of my regular maintenance routine. Maybe with the winter freeze / thaw cycles something similar happened and combined with ice damming, routed water down the fridge vent system (and eventually out on your floor) - especially if the sealing is compromised in any area. Anyhow, document your issue and please let the forum know how you made out. Hopefully warranty will look after you - if not, would your rv insurance kick in?