What does the Quick Cool feature do and how do I activate it?

Quick Cool speeds the cooling of large grocery loads by setting the refrigerator temperature to 34°F (1°C) and the freezer temperature to -6°F (-21°C) for 24 hours. Press QUICK COOL to select this mode; it will stay on for 24 hours or until manually turned off. After 24 hours or when turned off, set points return to their previous settings. (Page 4)