Welcome to the forums from SW Idaho.
Sorry I can not help much with the slide problem.
I will suggest you check the lines for leaks, do you know if there is a bleeder valve?
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping