refrigeration temperature range
The optimal temperature range for the refrigerator is 34 to 40 degrees Fahrenheit to keep food safe and unfrozen. If your thermometer reading is outside of this range after the temperature test, adjust the temperature settings.trekandshoot/iStock/Getty Images). Appliance Thermometer Information. You need a refrigerator/freezer thermometer to determine the current temperature range in both your fridge and freezer -- otherwise you won't know whether to adjust the temperatures to warmer or cooler settings.