For the whirlpool/kitchen Aid ice machines. turn off unit,  Remove front air grill screws(4) and grill to expose valve.  Remove two screws holding valve to unit wall.  Unplug two electric lines by depressing tab and pulling out.  Remove two water lines by pushing yellow rings towards body of valve while pulling on hose, 1 clear/ 1 grey.  Remember that grey line is pressure line and needs to be turned off at source usually under sink cabinet.  Grey line goes into longer straight valve port while fill line goes into shorter 90 degree port if you forget to draw picture, mark, or take photo of how lines are attached.  Install in reverse order.