I would start by giving the solenoids a light tap.
If that doesn't work have someone operate the slides while you keep your fingers on the solenoids, figure out which solenoid is controlling the slides.
Yours may look something like this
View attachment 20561
This picture shows 4 solenoids, front jacks, front and rear left side jacks, front and rear right side jacks and the slide hydraulics.
If your solenoid is sticking you can narrow it down by removing the wires and see if that solves your issue.
If the solenoid for the slides is stuck open, removing the wire will not help.
The hydraulics work by actuating the pump, either in a reverse or forward direction and then opening the correct solenoid.
Ok,my dog and I went outside to play with the wires on the solenoids.There is a solenoid right on one of the jacks,when I pull the wires off that solenoid the jacks won't run.So easy,the other solenoid is the slide,pull the wires off that one and that makes no difference.Wires on,wires off the same.The dog concures.So that would mean the solenoid is done,correct?
Ok,my dog and I went outside to play with the wires on the solenoids.There is a solenoid right on one of the jacks,when I pull the wires off that solenoid the jacks won't run.So easy,the other solenoid is the slide,pull the wires off that one and that makes no difference.Wires on,wires off the same.The dog concures.So that would mean the solenoid is done,correct?
I have warranty still,but my dealer is a ferry ride away.So I'll call them add get them to send me a new solenoid.I smacked the thing stupid with no positive results.It's real easy to change,with the dog helping.