We've a nuumber issues with the slides on our Ventana. On one occasion when one of the big slides wouldn't move, I called Newmar 24x7 Customer Support, and was instructed to turn off the saleman switch and leave it off for at least 30 seconds to drain the controller. I did this (switch was off for at least a minute) and the slide functioned properly. Had another occurence off a slide not moving, followed the same process and again issue was resolved.
My slide controllers are located, 2 on each side, of the pass thru bay. On the passenger side, the controllers on the frame rail. On the driver side, the controllers are on the compartment wall. Controller location most likely varies by model.
Safe Travels.