Have you tried to run the fridge completely empty overnight? They are big fridges that take a while to cool down and the freezer cools first then the fridge. Also, I always try to put items in the fridge that are already cool as room temperature stuff can also heat up the fridge too.
Also, during the day it will heat upó even more so on a hot day and even worse when you open and close it during the day.
In my case it was a combination of an obstructed fan and too much empty space above the fridge that allowed hot air to stay in the cabinet. If you pull the top vent off the back there should be no more than like a quarter inch gap above the fridge. If more then get some fire proof insulation above it to help the air cycle up and out behind the fridge. Unfortunately, the slide out fridges donít circulate air real well and create a ton of heat that is bad.
So I would say try running it empty overnight and if cold in the morning then maybe some of the above helps. If not cold by morning then you might have some cooling unit problems. But I will say in my experience (for what that is worth
) the freezer is working then the fridge will follow but it can take a while to get there.