A refrigeration expert from AO has advised that leftovers should not be placed directly in the fridge without first completing a 30-minute cool-down ritual. This practice helps maintain the fridge's internal temperature, particularly during the current UK heatwave.
Expert Advice on Leftover Storage
Jade Golding-Gault, refrigeration expert at AO, explained that putting piping hot food straight into the fridge can raise the internal temperature, forcing the appliance to work harder and potentially compromising other stored foods. She stated: "When temperatures rise, you might be tempted to store leftovers away immediately, but this does more harm than good. It's best to let food cool slightly before refrigerating."
Risks of Immediate Refrigeration
Refrigerators are designed to keep food at or below 4°C to inhibit bacterial growth. Placing a large, hot item inside acts like a radiator, emitting heat and raising the overall temperature. This can push surrounding items into the Temperature Danger Zone (8°C to 63°C), jeopardizing their safety. Additionally, hot food releases water vapour; if covered, steam condenses and makes food soggy; if uncovered, moisture escapes and promotes mould and spoilage.
Impact on Appliance and Food Safety
For large food items, the fridge compressor may not extract heat quickly enough, leaving the centre of the food dangerously warm for hours. Over time, this strain can lead to premature appliance wear, requiring repair or replacement. Golding-Gault recommends allowing roughly 30 minutes for leftovers to cool before storing them, which can also prevent food poisoning.
