How long should I wait before putting food in my newly installed refrigerator?
Wait 24 hours before you put food into the refrigerator after installation. If you add food before the refrigerator has cooled completely, your food may spoil. Note that adjusting controls to a lower (colder) setting will not cool the compartments any faster. (Page 3)
From the official Whirlpool Refrigerator manual, page 3
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