During a power outage, a Viking refrigerator can maintain its temperature for a limited time, typically between 4 to 6 hours. The exact duration may vary based on factors such as the refrigerator's model, insulation quality, ambient temperature, and the frequency of opening the door. It's essential to keep the refrigerator door closed as much as possible during the outage to retain the cold air inside and prolong the temperature stability. To extend the cooling duration, consider using ice packs or dry ice inside the fridge. If the power outage is expected to last longer, transfer perishable items to a cooler with ice to preserve their freshness and safety.