Households across the UK are being urged to carry out a quick one-minute check by placing a £5 note in the fridge door to test the seal. The advice comes after a heatwave pushed temperatures above 36°C, with extreme weather warnings and heat health alerts in place.
Why the Test Matters
Experts warn that damaged or worn fridge door seals can allow cool air to escape and warm air to enter, forcing the appliance to work harder. Over time, this extra strain can increase energy consumption and shorten the fridge's lifespan. Industry estimates suggest worn seals can boost energy use by 15–25%.
The Banknote Test
Guy Chapman, a silicone seal specialist at United Silicones, recommends the banknote test. "Close the fridge door on a banknote so part of it remains visible, then gently try to pull it out. If the note slides out easily without resistance, the seal may not be making good contact," he explained. He advises repeating the test around different areas of the door, as wear is not always evenly distributed.
Heatwave Impact
With temperatures expected to remain high, Chapman noted, "As kitchens become warmer during summer, a fridge has to work harder to remove heat. If the seal isn't doing its job, the appliance can fight a constant battle against warm air." He recommends checking seals before and after hot weather periods, as they can deteriorate due to age, use, and exposure to dirt and grease.
"The seal is the fridge's first line of defence against heat. When it's working properly, the appliance can operate as efficiently as intended," Chapman added.
