GE PSC23NSD SS refrigerator malfunction

Check the cover in back of the freezer for for frost build-up. I think Frost reached the evap fan-blades and stopped it from blowing cold to the ref-side. Contro;s can be confusing. The ON-OFF controls how long the compressor runs, and the other dial how open or choked the airflow from the freezer into the refrigerator. Sometimes it happens that you have that flapper shut and no air is getting moved to the reefer. If frost is on the cover you have dead heater elements on the evap coils or a faulty hi-temp limit switch, which is the disc thingee at the top of the coils. A bad timer also may disallow it going into defrost - think about it. Chris in big bEar