When you find the right setting, stop. The preferred temperature for many is between 35°F and 38°F. TEMPERATURE DISPLAY: To change the temperature display from Fahrenheit to Celsius, simultaneously press and hold the FREEZER and REFRIGERATOR buttons for approximately 5 seconds.To convert back to Fahrenheit, repeat the procedure.EMPERATURE DISPLAY: To change the temperature display from Fahrenheit to Celsius, simultaneously press and hold the FREEZER and REFRIGERATOR buttons for approximately 5 seconds. To convert back to Fahrenheit, repeat the procedure.