The best temperature for a freezer is 0 degrees Fahrenheit. An appliance thermometer can be used to keep a constant check on the temperature to ensure food safety during storage. This temperature allows most foods to stay safe and usable indefinitely.
To get the best results from a freezer, foods should not be crowded into the compartment. This allows the cooling unit to work properly by allowing air to circulate. After two hours at room temperature, foods should be put in the fridge or freezer to prevent harmful bacteria from growing. Proper temperature for a fridge is below 40 degrees Fahrenheit.