July 7, 2026, 2:53 pm | Read time: 2 minutes
Have you ever wondered what the small hole at the back of your refrigerator is for? Many people only discover it while cleaning—often when dirt or even mold has accumulated there. Yet, this inconspicuous opening serves an important purpose that many people are unaware of.
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 unit. 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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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. The best tools for this are cotton swabs, a straw, or a small bottle brush—avoid sharp utensils 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.
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Stubborn dirt can also be carefully scraped out with a toothpick. If mold is present in the drain, cleaning alone is not enough. The refrigerator should then be defrosted and thoroughly cleaned afterward.