We have a 2006 35' Georgie Boy Landau so familiar with the slide issues. The only problems we've had were related to a bad ground to the "Safety Switch" that you have to first hold down before pushing the In/Out switch. I found the safety switch to be unnecessary and just grounded out the line to that switch so all you need to do is push the In/Out switch.
The controller on my Landau is on the wall behind the kitchen drawers. I found the ground line going to the safety switch and ran a short line to the ground on the battery charger which is on the floor under the sink.
If that does not solve the problem, I'd replace the In/Out switch.
Let us know the outcome !
