What does the High Temperature Alarm mean and how do I stop it?

The High Temperature Alarm activates when the interior temperature stays too high for 36 hours — above 18°F (-8°C) in Freezer mode or above 59°F (15°C) in Refrigerator mode. Press any button to stop the alarm. Check that the appliance is in a well-ventilated room, that the door closes and seals properly, and that the room temperature is not too high. (Pages 8–9)