[Jim W]

If you can I would get on the roof of your trailer and pull the cover off of the A/C unit. I would look for either a plugged drain line or plugged drain hole on the unit. This should drain to the outside and on to the roof. You may want the A/C off as you look at this to insure there is no electrical damage that could occur or that you would get a shock from the A.C unit.

Good Luck.

Jim W.