My refrigerator is not efficiently cooling
John, you might want to find the manual for the fridge, and see if there's some way to get a trouble code.  You can often find them online these days ... even for older appliances.

It's possible that with everything computerized, you might have to do something before display a code, but in previous decades, there'd be a light that blinked with a given pattern, or multiple lights in a pattern, and you'd compare it to a table in the manual.  I would try to find one on the manufacturer's websites, although there are some sites that specialize in just manuals.**

It might be something as simple as needing to clean some cooling fins or coils, or just making sure they have proper airflow.  It's possible that they've gone the way of modern cars, where you have to connect a device to read the code ... in which case, the cost might be high enough to check the code that it'd be better to just  get a repair person in to take a look at it. 

** But there have also been groups putting up PDFs with exploit code in them ... they take legitimate stuff from other sites and use them as trojan horses.  I haven't heard of it happening with repair manuals, but I'd make sure your virus scanning software is running and up-to-date before downloading PDFs from just anywhere.