Refrigerator not cold - ice build up in freezer cabinet

Chronically faulty electronic board in upper right rear of refrigerator compartment - in Maytag and Jenn-Air. Unplug unit. Remove freezer food to ice chest. Remove baskets and shelves, ice hopper and rear lower panel to expose evaporater fins. Defrost with hair dryer and allow all moisture to dry. Then in refrigerator, remove top shelf food. Carefully remove the upper assembly cover by working the plastic down and slide forward to unhook from rear slide attachments - one on each side. This is the hard part of repair.

Then remove screws from rear wall and just behind the lamps to release the whole control assembly. In the rear right corner is the bad board. Unplug and replace with new board. Reassemble the fridge and freezer. Replug unit.