The Easy, Paper-Free Way To Find Out If Your Refrigerator Seal Is Leaking Air - Tasting Table
Briefly

Refrigerator door seals play a crucial role in keeping the inside cold. Warm air entering and cold air escaping can spoil food and elevate energy costs. Testing the seal can be done simply with a flashlight or by using a dollar bill. A flashlight test reveals light leakage, indicating a weak seal, while the dollar bill test assesses the resistance of the seal, with minimal resistance indicating the need for repairs. Cleaning or adjusting the seal may restore its effectiveness for optimal refrigerator performance.
A weak seal doesn't mean a broken seal. You'll notice the flexible gasket may need cleaning or adjustments to properly seal the fridge.
You can test if the fridge seal is leaking by using a flashlight; if light is visible when the door is closed, the seal has failed.
Closing a dollar bill in the fridge door can help detect leaks, with resistance indicating a strong seal, while little resistance reveals a weak seal.
If the seal around your fridge door is damaged, warm air can get in, cold air can escape, leading to food spoilage and increased energy costs.
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