If power is confirmed normal but the unit still shows no sign of cooling, such as no internal light, no compressor hum, or no fan noise, keeping the doors closed as much as possible helps preserve the existing cold temperature inside for longer while arranging for a repair visit or, if delay is likely to be significant, temporarily relocating particularly perishable items to a cooler bag with ice packs. If the unit is running, meaning the compressor and fan are audibly operating, but the interior is still not cooling adequately, this points toward a refrigerant, airflow, or thermostat issue rather than a complete power failure, and while less immediately urgent than a fully dead unit, still warrants prompt attention given the ongoing risk to food safety the longer the reduced cooling continues.