If the dial is in such a format in your refrigerator, try a setting at 3 if the range is 1-5, and at 4 if the range is 1-9. For the freezer, a setting at C is suitable.
The ideal temperature in the refrigerator ranges between 34 - 38 degrees F or 1 - 3 degrees C. So that foods such as vegetables and fruits remain fresh and crisp, the temperature may be set around 38 degrees F or 3 degrress C.
The ideal temperature in the freezer ranges around 0 degrees F (-18 degrees C) or lower. See more at:
http://www.buzzle.com/articles/refrigerator-temperature-settings.html
Our temperature display on our refrigerator is displaying "OF" for both the freezer and fridge.
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