I don't know what model you have but on my 3400 I found the problem like yours to be in the 2 junction boxes attached to the frame under the kitchen slide both full of water after driving in rain same problem you have opened them up dried them out with a hair dryer and resealed with silicone and no more problems yet but I do keep an eye on the boxes. hope this helps for you I did replace the GFI first thinking it was a bad one guessed wrong on that one so now I have a spare
|