Why can't I place hot food in the refrigerator before it's thoroughly cooled?

Date modified: 22nd September 2025 | This FAQ page has been written by Pilla Founder, Liam Jones, click to email Liam directly, he reads every email. Or book a demo to see how hospitality businesses use Pilla to manage food safety.

Answer Content

Placing hot food directly into a refrigerator can lead to a rise in the appliance's internal temperature. This can endanger all stored food by creating an environment where bacteria can multiply quickly. It’s important to cool food to room temperature or use rapid cooling methods before refrigerating to maintain food safety and appliance efficiency.

Common misunderstanding: It’s okay to put hot food in the fridge if I leave the fridge door open for a bit.

Leaving the fridge door open to cool hot food is not effective and can actually raise the temperature inside the fridge, putting all stored food at risk. Always cool food outside the fridge first.

Common misunderstanding: If my fridge is set to a very cold temperature, it can handle hot food without any problems.

Even if the fridge is set to a lower temperature, introducing hot food can cause temperature fluctuations that can lead to food spoilage and increased risk of foodborne illnesses. Always cool food before placing it in the fridge.

What risks arise from introducing hot food into a cooled unit?

Introducing hot food into a refrigerator can cause the overall temperature inside the unit to increase, potentially bringing it into the 'danger zone' (between 5°C and 50°C) where bacteria multiply fastest. This can compromise the safety of all food stored within the unit and increase the risk of foodborne illnesses.

Common misunderstanding: A few minutes of higher temperature won’t really affect the safety of other foods.

Even a small amount of time in the danger zone can be enough for bacteria to begin to multiply on some foods, especially those that are more susceptible to spoilage. Every minute counts when it comes to food safety.

Common misunderstanding: My fridge cools down quickly, so it can handle the temporary rise in temperature.

While some modern fridges can recover temperature faster than older models, consistently introducing hot food can strain the appliance, lead to higher energy consumption, and still risk food safety.

How can placing hot food in a fridge affect other items stored there?

Placing hot food in a fridge can raise the internal temperature, affecting other items stored inside. This can lead to uneven cooling and potential spoilage of food, especially items that are more temperature-sensitive or placed close to the hot food.

Common misunderstanding: If I place hot food on one shelf, it won’t affect items on other shelves.

Heat rises and the circulation of air inside a fridge can spread the warmth from hot food, affecting items on other shelves. It’s best to cool food outside the fridge to avoid this issue.

Common misunderstanding: As long as the hot food is covered, it won’t affect other items in the fridge.

Covering hot food does help contain some of the heat, but it doesn’t prevent the overall internal temperature of the fridge from rising, which can still impact other stored foods. Cooling food before refrigeration is always the safest practice.

When is it appropriate to use a walk-in fridge to finish cooling hot food?

Use a walk-in fridge to finish cooling hot food if nearing the 90-minute time limit and the food has not cooled enough.

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What should I do if the blast chiller breaks down when cooling hot food?

If the blast chiller stops working, quickly switch to alternative cooling methods to ensure food safety.

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How can I cool food quicker using the surface area?

To cool food more quickly by increasing the surface area, spread the food out in a thin layer or use shallow trays. This method exposes more food to cooler air, speeding up the cooling process.

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Should I cool leftover hot held food for reuse?

No, you should not cool leftover hot held food for reuse. Once food has been hot held and is left over at the end of service, it should be discarded to ensure safety and maintain quality.

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Can I use running cold water to cool rice, pasta, and vegetables?

Yes, running cold water can be used to cool rice, pasta, and vegetables quickly. The constant flow of water efficiently removes heat from the food, speeding up the cooling process.

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What cooling records should I maintain in the kitchen?

In the kitchen, it is important to maintain detailed cooling records for all types of food to ensure food safety.

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How should I date label food after it has cooled?

After cooling food, label it with the date it was cooked and cooled. This helps in tracking how long the food can be safely stored. Use a date label on the container for visibility.

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What should I do if food isn't adequately cooled after 90 minutes?

If food hasn't cooled to the required temperature within 90 minutes, it's crucial to immediately discard the food to prevent food safety risks.

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Is it important to cool hot food quickly to avoid bacterial growth?

Yes, it is essential to cool hot food rapidly to prevent bacteria from growing.

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What should be the maximum size and weight for joints of meat to cool them safely?

To cool joints of meat safely and effectively, they should ideally not exceed 2.5kg in weight and 50mm in thickness or height.

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How quickly should hot food be cooled to be suitable for refrigeration?

Hot food must be cooled to a temperature suitable for refrigeration within 90 minutes of cooking to prevent bacterial growth and ensure food safety.

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Why can't reheated food be cooled a second time?

Reheating and then cooling food a second time is risky because it exposes the food to the danger zone between 5°C and 50°C multiple times, significantly increasing the likelihood of harmful bacterial growth. Once food is reheated, it should be consumed immediately or disposed of if not used.

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How should shellfish be cooled safely?

To safely cool shellfish and maintain freshness, place the shellfish in a bath of potable ice and water immediately after cooking.

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How can I use a convection oven for cooling hot food?

Using a convection oven for cooling hot food can be effective with specific settings designed to remove heat and steam.

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