I have a very nice Frigidaire Gallery refrigerator purchased in 2015. The freezer has what the manual calls an Auxiliary Freezer (Temperature) Control. I was disappointed to find I could not move it out of the middle (Recommended) position the first time I tried to make a temperature adjustment in just the freezer. I was able to manage to keep both compartments more or less within the temperature range I desired using only the Refrigerator/Freezer Temperature Adjustment Control in the refrigerator compartment. In between 2 appointments with a service company (that never showed !!) to look at the problem under the extended warranty I found that for some reason the Auxiliary Freezer Control now moves out of the middle (Recommended) position. I moved the control to a colder position and according to the thermometers I have in each compartment the temperatures are very good. My question is should the settings I now have for each temperature control be good for a long time or could factors such as room temperature, quantity of food in each compartment, etc. require that I change these settings from time to time? Thanks .