Recently, both of my slide-outs quit working on my recently purchased 2010 Rockwood Mini Lite ETC RV trailer. With help from this forum, I found the two fuses for the slide-outs underneath the trailer at the front of the trailer, not far from the battery. They are marked "Maximum 30 amps", but I replaced with 25 amp since that's what was there before. If it happens again soon, I may move to 30 amp.
I have no idea why they both blew at the same time, unless.... I had been parked for several days, running a small heater from house current; then used the slide-outs several times that morning before they quit. I wonder if that had something to do with it? Thanks for the help!!