Apocalypse mod has a recipe to convert fridges to vehicle parts, which you can install on a vehicle without wheels. I built a solar fridge on an apartment roof with this method! It also adds a recipe to convert a fridge vehicle part into a freezer, too.
You’ll also need to install a vehicle lift since it’s so dang heavy, to mount it onto your “vehicle”. My Crude & Improvised tools mod includes a recipe for a cheap lift. Crude & Improvised Tools Mod
Check into adding a mod to an existing game, then you’ll be able to see the recipe after hitting *. It’s used on a fridge furniture item to turn it into a vehicle part.