First thing you gotta ask is, "Is this fridge getting what it needs to cool??" Check the frost pattern on the evaporator in the freezer. If the frost pattern is little to none, then you either have a refrigerant leak, or a restriction. My experience on some Samsung French doors is the heat exchanger gets restricted, and gives these symptoms. This is because the refrigerant goes into the fridge evaporator first, and then down to the freezer evaporator. When the refrigerant gets low, or restricted, the refrigerant never makes it to the freezer.If you don't have the tools and knowledge for these types of repairs, it is probably best to call in the pros. Just to test if it is a leak or a restriction requires guauges, hoses, recovery unit, refrigerant scale. . . etc.
I was just curious about the problem you had with freezer could you please let me know what you did to fix it ,i have same problem plus display show right temp until 30 degree when freezer temp drops to 25 display starts showing wrong temp(the temp of setpoint -8) and freezer never gets close to the setpoint which is -8 and stay on 25 as soon as changed the off set for both freezer and refrigerator temp sensor ( lowered the sensor offset by 7 degree cooler for both )now my freezer stay at 60 and even refrigerator would not go below 40 which it was doing that before i change the offset.and i should add this Samsung french door with inverter compressor ,at start up would pull 5 amp and then the amp drops to .7 while compressor running .any idea thanks