I just had this problem. Went to an RV dealer in Missoula, they fixed it. It was a shear pin. It broke because the slide out was out of alignment, or the slideout got out of alignment and the shear pin broke, not sure which came first. It was a two hour fix and Forest River covered it. (I'm still under warranty.)
Don't know what caused the misalignment, last time it worked, I was in a state park near Bismarck, ND.
Working fine now and I'm home.
JJ only, my cat went to Rainbow Bridge July 2015
I love my Sunseeker, when I'm on a trip I don't wanna go home!!!"
Total days camping each year: AS MUCH AS POSSIBLE!