Here is a STAR-K guide to using ovens on Shabbos and Yom Tov.
For the most accurate and updated certification status of appliances, visit the STAR-K Appliance Page. STAR-K has recently certified nearly 600 new models of refrigerators/freezers of brands including Frigidaire, KitchenAid, LG, Liebherr, Perlick, Sub-Zero and Whirlpool, among others.
Halacha PSA regarding moving shelves in refrigerators or freezers: Rav Moshe Heinemann shlit”a and other leading poskim rule that moving these shelves involves the melacha of boneh (building) and therefore is prohibited. Additionally, some appliances have lighting in the shelves which may go off when the shelf is moved, which is also prohibited. Therefore, one should take care not to jostle the shelves while loading and unloading items as doing so may cause these lights to flicker.