Set your freezer dial to 0°F (-18°C). If your freezer uses a number scale (e.g., 1 to 5, or 1 to 9), this generally corresponds to the middle setting (like 3 or 4). This optimal balance prevents bacteria growth while saving energy.
Freezer temperatures should ideally be 0ºF (-18ºC) to maintain the quality and integrity of frozen items. It's also acceptable to keep the temperature at -1ºF to help reduce freezer burn.
Your freezer is colder on 5. On most standard dials, the numbers represent "cooling power". 1 is usually the warmest setting, while 5 is the coldest.
Freezer Temperatures
The temperature of a freezer should be set at 0 degrees Fahrenheit so everything stays very cold. A freezer should be cold enough to keep food frozen and preserve it until they are ready to be cooked or reheated.
0 off, 5 is the coldest.
Fridge temperature settings are generally numbered from 1 to 5, with 5 being the coldest. A fully stocked fridge may need to be set to a higher setting (around 3 or 4), while a fridge with more empty space is best set between 2 and 3.
Answer: The temperature "-10" degrees Celsius is colder than "-5" degrees Celsius. On the Celsius scale, numbers further from zero in the negative direction represent lower, and therefore colder, temperatures.
Freezers are set to 0∘𝐹 (−18∘𝐶) because it is the scientifically recognized threshold that safely halts the growth of microorganisms and bacteria that cause foodborne illness. At this temperature, food quality and texture are preserved, and food can be stored indefinitely without posing safety risks.
The ideal freezer setting is exactly 𝟎∘𝐅 (−𝟏𝟖∘𝐂). This temperature safely inhibits bacterial growth, preserves food quality, and prevents unnecessary energy waste.
No, 10°F is not cold enough for long-term food storage. The FDA recommends keeping your freezer at 0∘F0 raised to the composed with power F𝟎∘𝐅 (-18∘C18 raised to the composed with power C𝟏𝟖∘𝐂) or below.
To keep food cold and fresh but not frozen, the ideal fridge temperature should be set somewhere between 3-5°C (37-40°F). Some fridges have a temperature reading, but most have a numbered dial. This usually goes from 1 to 5, with 5 being the coldest.
Most fridges have a temperature control dial numbered from 1 to 5 or 1 to 7. The higher the number, the colder your fridge will be. This can be counterintuitive, as many people assume a higher number means warmer.
Your freezer should be set to 0°F (-18°C) or below. To quickly check if it is cold enough, place an Appliance Thermometer inside, listen for your compressor running, or check if ice cream is rock solid. If food is soft or icy on the outside, your freezer is likely too warm.
The Amish keep food cold using a variety of off-grid methods, tailored to the strictness of their local church district. Common practices include:
If a freezer is too cold, it causes excessive frost buildup, drives up your electricity bills, and accelerates freezer burn which dries out and degrades your food's flavor. It can also overwork the appliance motor. The ideal temperature is 0∘F0 raised to the composed with power F0∘F (-18∘Cnegative 18 raised to the composed with power C−18∘C).
A good starting point is the middle setting (for example, 3 or 4). You can use a freezer thermometer to check the temperature and adjust it gradually. Small tweaks are better than large jumps to avoid over-cooling and wasting energy.
Putting a penny (or any coin) in the freezer is an easy trick used to check if your freezer lost power while you were away, and whether your frozen food is still safe to eat.
There are several factors that influence the time it takes to freeze ice. On average, it can take 30 minutes to up to four hours to freeze ice.
Freezer problems and possible solutions
Interior Controls with Digital 0-9 Settings
The setting of 5 for both the fresh food and freezer section is the recommended setting for most environments.
No, the air temperature does not need to be below freezing. Frost can form when the air is as warm as 36∘F36 raised to the composed with power F36∘F to 38∘F38 raised to the composed with power F38∘F [0.5.1, 0.5.9].
Keep your thermostat set to a minimum of 55°F (13°C) to keep your pipes from freezing. If you are leaving the house for an extended period, maintain this temperature to ensure heat reaches the walls where pipes are located.
Except for outdoor models, Sub-Zero products are designed to run in a 60°F to 90°F (15°C to 32°C) environment. Refrigeration units are not designed to heat. They remove heat from the compartment and cannot add heat to it. When a unit reaches a temperature below the lowest setpoint, it will not work properly.