Refrigerators have made food preservation simple and manageable. When set at the right temperature, your fridge can keep food cold and safe from bacteria for a long time. Now you must wonder: what is the best temperature for a refrigerator?
Let’s understand what temperature the refrigerator should be, why keeping the right temperature matters, and learn to measure and control the temperatures to keep food safe and fresh for a long time.
What Should The Temperature Be Inside Your Refrigerator?
FDA advises keeping the refrigerator temperature to 40°F (4.4°C) or below. Though you can set your refrigerator temperature between the range of 34°F and 41°F.
When the temperature goes above the recommended levels, it leads to rapid bacterial growth. For both the quality of food and prevention of food-borne illness, it’s best to keep your refrigerator within the safe ranges.
Why Refrigerator Temperature Matters
Here is why the right temperature matters:
To Keep Your Food Safe
Warm temperatures are ideal for bacteria to thrive, including E.coli and Salmonella. Keeping the temperature between 37-41°F (3-5°C) can help prevent food poisoning caused by these pathogenic organisms.
To Maintain the Food Quality
A cool, consistent temperature keeps food fresh and preserves its taste. It also helps vegetables stay crisp, dairy stays smooth, and meat remains tender.
To Use Energy Efficiently
Keeping the refrigerator temperature low costs more electricity. Setting it to 40°F (4°C) not only keeps food cold and fresh but also saves your energy.
To Increase the Refrigerator Life Span
When the temperature inside the refrigerator changes frequently, it demands more work from the compressor. A consistent temperature aids your refrigerator in running efficiently and lasts longer.
Is Your Refrigerator the Right Temperature?
It’s important to ensure your refrigerator is the right temperature because not all temperature gauges are accurate. What happens is you often set the temperature at 37°F (2.7°C), but it’s actually keeping temperatures around 33°F (0.5°C) or 40°F (4°C).
Some fridges don’t even show temperatures. There is a scale of 1 to 5, with 5 being the warmest. And you would need a thermometer for the fridge to check what each number means in Celsius or Fahrenheit.
Check the Temperature With a Thermometer.
Checking the correct refrigerator temperature is crucial to ensure the freshness and safety of food. You can monitor the temperature of your fridge using an appliance thermometer.
Here is how you can do it:
- Place the thermometer in a glass of water and put it on one of the middle shelves.
- Leave it for at least 8 hours without opening the door in between.
- Then check the temperature and see if it’s optimal (between 34°F and 41°F) or close to it.
- If it’s not the ideal temperature, change it properly using the control panel.
- Now wait for 28 hours before checking the temperature again.
When checking the temperature, place the refrigerator thermometer in different spots inside your refrigerator. This ensures you’re taking the accurate temperature across the entire fridge.
How to Change the Refrigerator Temperature
If your refrigerator’s temperature is incorrect, here is what you should do:
Locate the Temperature Controls.
There are two types of refrigerator temperature controls: digital and analog. Analog or manual controls are generally located inside the fridge, along the wall. However, a digital or LED display panel can be found on the refrigerator doors.
Adjust the Temperature
Manual controls: Rotate the dial to increase or decrease the temperature. Wait 24 hours for the cooling to settle before you make another adjustment.
Digital controls: LED display panels usually have temperature buttons, or you can use arrows to change the refrigerator temperature.
Modern refrigerator models have a visual temperature readout, which makes setting the refrigerator to the optimum temperature 40°F (4°C) easier.
The refrigerator temperature controls with numbered settings usually indicate power levels, ranging from 1 to 5. The highest number stands for the highest power level. However, these numbers don’t immediately coincide with the temperature you set. It might take some time to adjust the cooling inside.
However, if you have temperature controls labeled low, medium, or high, you need to check the refrigerator user manual to understand what these terms mean in Celsius or Fahrenheit.
How to Maintain Ideal Temperature
Check the refrigerator settings
Fridges usually contain sliders, dials, and digital panels to set the temperature. But they don’t always tell the actual temperature inside the fridge. That is when you should get hold of a thermometer to check the actual reading, so you can make changes if needed.
Restrict door openings
When you open the fridge door too often, you help cold air to escape and warm air to enter. Resist the urge to hunt for food, leaving the door open too long.
Don’t overfill the fridge
When you pack your refrigerator completely, it hinders air circulation. This leads to uneven temperature throughout the fridge, which makes it difficult to maintain the ideal temperature.
Leave space near vents and consider reorganizing your fridge if you have stored too much stuff inside.
Let the food cool first
Warm food can increase the temperature inside the fridge, so before you put the leftovers in, let them cool first.
Keep a check on the gaskets
Dirty or cracked gaskets or door seals allow cold air to escape, which makes the compressor work harder. Keeping a check on them can prevent this from happening and help maintain the proper temperature.
Keep the refrigerator a few inches away from the wall
Place your refrigerator a few inches away from the wall to allow air to freely circulate behind your fridge. This also helps cancel out some of the heat your kitchen appliances generate.
What to Do if Your Fridge is Too Warm or Too Cold
If your fridge is too warm
It can happen if the settings have changed unintentionally. You can change the setting to the ideal refrigerator temperature. Leave it for a few hours and then check the cooling.
Avoid overfilling your refrigerator; if you’ve stuffed too much inside, the cold air can’t move freely. This leaves some areas too warm and some too cold to turn your meal into a frozen one.
If your fridge is too cold or ice is building up
Keeping the temperature too low doesn’t keep your food fresh for long. Moreover, it causes ice to build up inside. Here is how to get rid of it:
- Switch off the refrigerator and empty the contents
- Leave the door open and allow the ice to thaw. You can use towels to soak up the water.
- Once the ice dissolves completely, clean the interior of the refrigerator.
- Check the door seals; if they are ragged, the moisture can enter and build up ice.
- Now adjust the right temperature, put the food back in, and switch on the fridge.
Bottom Line: What Temperature Should a Refrigerator Be At
Keeping your refrigerator temperature at 40°F or below helps preserve food effectively. It’s essential to know how to check using an appliance thermometer and maintain the right temperature inside the refrigerator.
Small habits like placing the food in their shelves, such as perishable food on the lower shelf, can help your fridge run smoothly and prevent your food from going bad.
FAQs
How long does it take to get a refrigerator cold?
A full-sized household refrigerator takes around 4-12 hours to get cold after it is plugged in. However, there are multiple factors influencing the time a refrigerator takes to cool, including:
- The size and volume inside it,
- The ventilation and airflow system quality,
- The strength of its compressor
- The age of the refrigerator: A newer refrigerator may take less time to get cold as it is generally more efficient compared to an older refrigerator.
Should you change the temperature in your fridge?
Yes, it is recommended to change the refrigerator temperature if it is not set correctly, which is between 37°F and 40°F. Keeping the temperature within this range prevents the growth of bacteria and freezing.
What temperature should a freezer be?
The ideal freezer temperature should be around 0°F (-17.7°C). However, if you’re adding new food to the freezer, it’s best to lower the temperature. You can do it manually, but make sure to change it back, as it can cost you electricity.
Is 37°F too cold for a refrigerator?
37°F is the ideal refrigerator temperature. Food stored at this temperature remains fresh for longer. It also prevents ice crystals from forming.
Why isn’t my refrigerator staying cold?
Your fridge and freezer aren’t staying cold due to various possible causes, such as improper installation location, unorganised food, improperly set temperature controls, or dirty condenser coils.
You may also find this related blog post very useful:
How Long Can I Keep Meat in the Fridge?
Leftovers and Food Safety: How to Store and Reheat Leftovers Safely
How Long Do Eggs Last in the Fridge?
What refrigerant is used in refrigerators?
Idea storage temperature for your food.
Refrigeration in Food Preservation
About The Author
Evan Wang
I am Evan Wang, the General Manager, Marketing Director, and SEO Expert at Sunnyda Cold Room. I have over 20 years of experience in the refrigeration industry, and my expertise is in commercial refrigeration solutions.
I’d be delighted to share practical ideas about refrigeration products, project selection, export trade, SEO, and marketing.
Let’s connect!
