damper and encoder controls

I have no defrost problems but fridge is to warm already replaced defrost heater and thermostat freezer works great but fridge side stays around 55.I have noticed the damper door closing when i open the fridge and i also noticed that the evap. fan runs but not all the time, so I was wondering if the 2 dials on the fridge side (the encoder) may be my problem, I have already ordered the part from this site yesterday,but in the meantime I need a little reassurance that it is not something else. Any ideas?