TEMPERATURE SELECTION: REFRIGERATOR compartment temperatures can be set from +34°F to +45°F. The Sub Zero factory recommended range for a fresh food compartment is between 34°F and 38°F, with 36°F being the optimum temperature to maintain food freshness and minimize excessive run time. Temperature settings for fresh foods are usually decided by ones own taste for cold drinks, water, juices and milk serving temps are the driving factor here. FREEZER compartment temperatures can be set from -5°F to +5°F. The Sub Zero factory recommended setting is between 0°F and 4°F above zero. While most food industry standards recommend storing frozen food at 0° (see note 2), a higher setting will preserve your frozen foods while conserving energy. It is recommended that you avoid storing frozen foods above +4°F degrees; likewise it makes no sense to set your freezer in the minus temp settings, there is nothing to be gained in exchange for the excessive run time and expense this will create. HOW TO SET THE CONTROL: To adjust set-points, press WARMER or COLDER key on control panel in multiple key strokes until desired set-point is achieved. One key stroke equals one degree change. The temperature range in a freezer compartment is -5°F (-21°C) to +5°F (-15°C). The temperature range in a refrigerator compartment is +34°F (+1°C) to +45°F (+7°C). The initial stroke of the WARMER or COLDER key will change the previous set-point by one degree. The set-point will be displayed on the LCD for 10 seconds after the last key stroke. After the 10 second delay, the compartment temperature will be displayed. As the compartment temperature changes, the temperature displayed on the LCD will change by no more than one degree per minute. WHY 4°F AND 36°F: The first thing you need to realize when choosing your personal temperature settings is that a lower number will create a colder compartment, a colder setting will also increase the amount of run time required of your Sub Zero to achieve that selected temperature. So a lower temp setting while increasing the run time will also result in higher energy consumption. The point is that mid to upper temperature ranges are often more desirable in the refrigerator compartment because they will still maintain food freshness (see note 1) while reducing energy costs. Remember when making adjustments to your controls, to achieve your desired results, it is best to adjust up or down in 1 degree increments and then allow 24 hours for the new setting to stabilize. It is also a misnomer that you should turn your refrigerator to a colder setting when the weather warms up, or a warmer setting when the weather cools down. The cabinet (inside the refrigerator) temperature will be achieved regardless of ambient (outside the refrigerator) temperature. When you set your refrigerator control to 36° degrees, the refrigeration system will run until that cabinet temperature is achieved and then it will cycle off. If the ambient temperature rises dramatically, your control will still cycle the unit off at 36 degrees. If warmer outside, it may have to run a little longer but it will not cycle off until it achieves 36 degrees. If you turn it down to a colder temperature, say 34 degrees, you are just making it run longer to reach that colder cabinet temperature, without the benefit of better food storage. If your refrigerator ever fails and for example, let’s say that you know the refrigerator is running but the cabinet temperature is getting warmer. Turning the control to a colder setting will not solve your problem because the unit is already running and not able to reach your pervious selected temperature. In this case, a colder setting will not cause it to run colder. If your refrigerator is running and the temperature continues to feel and display warmer than normal, call for service. Your Sub Zero has a 10 degree adjustable temperature range for both the refrigerator and freezer compartment.