Insufficient frash food cooling

gss25jfmcww replaced thermistors, main board, evaporator fan, and defrost coil. fresh food section will not go below 60 degrees F. The first problem I had was a defrost problem which is now cured, however the fresh food section won’t go below 60F regardless of the thermostat control position! The freezer is frezing and the damper is working. Tested new thermistor. Checked OK!