I have a 2011 Montana with both a wall mounted switch and a remote to opperate slides. The wall mounted switch does not work all of a sudden but the remote does. About 3 yrs ago I had the same issue and a call to Keystone tech suport provided me with the reset procedure.
To late for them, does anyone know the procedure as I have forgotten it.
2006 Ram 2500 Cummins, 6 sp manual, pacbrake
2011 Montana Mountaineer 335RET, Mor/ryde PB
Trailersaver BD3 hitch--Smooth ridin'