The USDA says you should never taste food to determine safety. The agency has the following food safety tips related to power outages and says, “When in doubt, throw it out.”
During a power outage, keep refrigerator and freezer doors closed. The refrigerator will keep food safe for up to 4 hours. If the power is off longer, you can transfer food to a cooler and fill with ice or frozen gel packs. Make sure there is enough ice to keep food in the cooler at 40°F or below. Add more ice to the cooler as it begins to melt.
A full freezer will hold the temperature for approximately 48 hours (24 hours if it is half full).