Slide not working - 2010 Four Winds Chateau

I had an issue with my slide as well...bottom would move a bit, but top would not-like something in the way. What I found that worked on mine is on the slide awning (topper), the white plastic ring that looks similar to the manual awning deployment mechanism (has like a "T"bone shaped end). Well mine was loose and cock-eyed, preventing slide from opening, I straightened it and screwed down the set screw. ALL IS WELL. I am told that this is to "stop" the topper on retracting....little did I know it would also prevent from deploying.
Good luck.

Sometimes the gaskets sticks, give it a little help as richardwise said. Next take it back to dealer. Look up on top and all around to make sure nothing it in its way.

Try pushing out on top of slide when opening. That may work, had to do that on a TT I had. Bottom, where mechanism is, will start to move and top doesn't, causing a bind. Hope this helps.