Originally Posted by JohnRR
I would think the relay provides power to the switch so if it works one way it should work both ways. My guess would be check the switch.
If his control board is like mine, Yes, the slide can go out and not come back.
Most likely the connection from the relay on the board has overheated and not making contact. I had both of my slide control boards do this on a recent trip. I replaced both with new, but also repaired the old by soldering the bad connections.
My slide uses a DC motor and the control board receives the voltage from the in/out switch and sends either a +12VDC or a -12VDC to the slide motor.