A new refrigerator should cool down for 4 to 8 hours before you add food, though some manufacturers recommend waiting up to 24 hours. This waiting period allows the appliance to reach a stable operating temperature and ensures proper cooling performance.
When a refrigerator is first delivered, its compressor and cooling system need time to circulate refrigerant and establish normal temperatures throughout the unit. If you plug it in immediately after purchase or delivery and add food right away, the appliance may not cool food adequately, risking food spoilage and safety issues.
The exact waiting time depends on several factors: how long the refrigerator spent in transit, whether it was stored horizontally during delivery (some models require time to settle before operation), and the ambient temperature of your kitchen. Refrigerators transported or stored on their sides may contain refrigerant in the wrong part of the system and need extra time to resettle.
To be safe, consult your specific refrigerator's user manual, as manufacturers often provide exact recommendations. If no manual is available, 4 to 8 hours is a reliable guideline for most modern refrigerators. Some people prefer to wait overnight (8 to 12 hours) for complete assurance, which is never harmful. Once the unit has cooled properly, you can safely store food without delay. Set your refrigerator to the recommended temperature (usually 35–38°F or 1–3°C) and let it stabilize before loading it with groceries.