GE Monogram freezer side working but refrigerator...

Question

GE Monogram Refrigerator / Freezer - BISB42ELD - 20 years old - the freezer side is working but the refrigerator side is not (lowest temp is 50 Deg on Cold setting 9). Repairman replaced fan which improved operation to condition above - prior to replacing fan - freezer was 45 / 50 and refrigerator was 55/ 60). Compressor works.