I got a car with a minifridge and full battertys ,and the fridge is ON from the controls.The food has been there for 1 mounth but then i remembered that it shold give cold stats to the food.
(sorry for bad english)
Only specific food items can get cold.
I mostly have veggy’s (carrots , cabage ).
Try water
It worked for water … sorry for not knowing the game , i am some what new. 