Chosen Solution
Have a side by side kitchen aid fridge KRSC503ESS01. Just got it a month ago. The freezer is ice cold but just noticed last just that the fridge side is room temperature up high and just cool near the bottom of the unit.
Cause 1 Damper Control Assembly The air damper control opens and closes to let the proper amount of cold air into the refrigerator compartment. If the damper does not open properly, it won’t let enough cold air into the refrigerator. Check the damper control to determine if it is broken or stuck closed.