I have it easy since my refrigerator was manufactured before much of the Shabbos/Yom Tov challenging features became available. All I’ve needed is a piece of good quality duct tape applied over the pressure switches inside the doors and that takes care of the lights and the fans.
An article posted here not even a year ago by Rabbi Hoffman describes some of the issues the newer technology presents and, apparently, those issues are no longer limited to just very high-end models. He also identifies a device approved by Rav Belsky, zt”l among others that provides an easy to use – though not inexpensive – solution that some manufacturers examined and said would not damage their products. It goes for about $133 including shipping.
http://www.theyeshivaworld.com/news/headlines-breaking-stories/474948/is-your-fridge-kosher.html