The Reason for the Small Hole in the Refrigerator

September 1, 2026, 3:20 pm | Read time: 2 minutes

What is the purpose of the small hole at the back of the refrigerator? Many people only notice it when they thoroughly clean the appliance and find dirt or even mold there. However, this inconspicuous opening serves an important function that is often overlooked in daily life.

This is what the hole in the refrigerator is for

The hole in the refrigerator is a drain designed for condensation that forms in every appliance. The water flows through the drain into a collection container at the back of the refrigerator, where the compressor is located. The compressor provides cooling, generating heat that causes the condensation in the container to evaporate.

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If the drain is clogged, you can use a plunger to help clear it.

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What to do if there is too much condensation in the refrigerator?

If too much condensation forms, it can either flow back into the refrigerator or overflow from the container. This happens, among other things, when the hole in the refrigerator, or the drain, is clogged.

Afterward, you should keep an eye on the condensation development in the refrigerator. If an excessive amount of water still forms a few days later, it’s clear that a dirty or clogged drain isn’t the only reason. Possible causes could also be old or defective refrigerator seals, which can be easily replaced. Leaving the refrigerator open for too long sometimes leads to more condensation, as does frequently cooling food that is still too warm.

Properly cleaning the refrigerator drain

Therefore, it’s important to clean the drain regularly. It’s best to use cotton swabs, a straw, or a small bottle brush–just avoid sharp tools like knives or similar items, as they could cause damage. You can carefully insert these tools into the hole in the refrigerator to clean it. Finally, a little vinegar on a cotton swab helps with disinfection.

Stubborn dirt can also be carefully scraped out with a toothpick. If there is mold in the drain, cleaning alone is not enough. The refrigerator should then be defrosted and thoroughly cleaned afterward.

This article is a machine translation of the original German version of MYHOMEBOOK and has been reviewed for accuracy and quality by a native speaker. For feedback, please contact us at info@myhomebook.de.