My samsung ref rt30mass ref compartment is not working properly even with adjustments made from its temperature however the freezer is working properly

The defrost thermostat is not working and the evaporator compartment is blocked with ice. That will stop cold air from entering into the fresh food compartment.
Move your food to another refrigerator, then unplug and open the Samsung refrigerator for 24 hours and allow the ice to melt.
Then remove the freezer panel inside and locate and replace the little plastic tube like part that is zip tied to the expansion tubing. It should have 2 brown wires coming out of the plastic sealed tube/ thermostat part. Write down your model number and go to Samsung's website or searspartsdirect and buy a new thermostat.
I believe the operating range for said thermostat is 20 C to -5 C. you'll most probably have to cut the wires and splice in the new thermostat. You can also use a generic thermostat with the same or nearly the same ratings of 20/-5 C temp.
All the thermostatic switch does is control the defrost heating element that melts the ice off the evaporator every 10 to 12 hour cycle via the defrost timers switch located at the bottom rear of the refrigerator. You can turn the clock counter clock wise until the first loud click to force the machine into defrost as well. Although if the defrost heating element, thermistor, THERMOSTAT, or defrost timer switch has malfunctioned there will not be a defrost cycle and ice will form inside the ducting and evaporator compartment and block the cold air circulation and the fresh food compartment will not cool and the freezer section will barely freeze water. The defrost thermostat is not working and the evaporator compartment is blocked with ice. That will stop cold air from entering into the fresh food compartment.
Move your food to another refrigerator, then unplug and open the Samsung refrigerator for 24 hours and allow the ice to melt.
Then remove the freezer panel inside and locate and replace the little plastic tube like part that is zip tied to the expansion tubing. It should have 2 brown wires coming out of the plastic sealed tube/ thermostat part. Write down your model number and go to Samsung's website or searspartsdirect and buy a new thermostat.
I believe the operating range for said thermostat is 20 C to -5 C. you'll most probably have to cut the wires and splice in the new thermostat. You can also use a generic thermostat with the same or nearly the same ratings of 20/-5 C temp.
All the thermostatic switch does is control the defrost heating element that melts the ice off the evaporator every 10 to 12 hour cycle via the defrost timers switch located at the bottom rear of the refrigerator. You can turn the clock counter clock wise until the first loud click to force the machine into defrost as well. Although if the defrost heating element, thermistor, THERMOSTAT, or defrost timer switch has malfunctioned there will not be a defrost cycle and ice will form inside the ducting and evaporator compartment and block the cold air circulation and the fresh food compartment will not cool and the freezer section will barely freeze water.