No, adding extra stuff to the fridge or freezer does not make it colder. In fact, the opposite is true. The refrigerator and freezer work by removing heat from inside the unit and expelling it outside, which cools the interior. When you place warm or room temperature items into the fridge or freezer, it causes the appliance to work harder to remove the additional heat.
The more items you add to the fridge or freezer, the more heat it needs to remove, which can result in a slight increase in temperature inside the unit. The refrigerator or freezer will then have to work longer and harder to bring the temperature back down to the desired level.
To maintain the most efficient cooling and ensure food safety, it's essential to allow space for proper air circulation within the refrigerator and freezer. Blocking airflow by overcrowding the compartments can lead to uneven cooling and potential food spoilage. Additionally, if the refrigerator or freezer is too full, it might be challenging to organize and access items, making it less practical for everyday use.
If you need to cool down items quickly, it's a good idea to cool them to room temperature before placing them in the fridge or freezer. This reduces the strain on the appliance and helps maintain a consistent and safe temperature for all your stored food items.