Maytag fridge - ice and water stopped working

[SIZE=2]I’ve seen some replies that the control baord is the likely culprit, and the one that seems to apply to my fridge ispasrt # AP4068159. I saw one post recommend to replace a barrier part too…that part # being AP4068353. Where does that barrier part get installed? The photo doesn’t really help. Thanks for any feedback you can provide, as I’ve not taken the fridge door apart. Cheers, John[/SIZE]