Why the refrigerator smells rotten - and how to get rid of the smell forever

Did you open the refrigerator, and such a “aroma” hit you that you had to pull back? A rotten smell from the refrigerator is a problem that almost every second owner of appliances older than 5 years faces. But even new models Samsung, LG or Indesit are not immune from this trouble. It can smell in different ways: rot, hydrogen sulfide (like rotten eggs), fish, or just “swamp.” This cannot be ignored - the smell not only spoils the appetite, but also signals potential breakdowns or health hazards.

In this article we will analyze all possible reasons - from the trivial (expired kefir in the far corner) to the serious (freon leak or malfunction of the drainage system). You will learn how precisely determine the source of the stenchto eliminate it with your own hands and prevent its reappearance. And also - when it’s worth urgently calling a specialist so as not to end up with expensive repairs.

Spoiler: in 80% of cases the problem is solved in 10-30 minutes without special tools. But there are also insidious cases when the smell returns again and again. Let's look at it in order.

1. Spoiled food is the first and most obvious reason

Start by auditing the contents of the refrigerator. Even if it seems to you that everything is fresh, the rotten smell can come from one small bag of sauce lost behind the vegetable drawer, or from a piece of meat that is “hidden” under the tray. It is especially dangerous if the food has begun to rot in freshness zone (if your model has it) - the temperature is higher there and bacteria multiply more actively.

What to check first:

• 🥛 Dairy products: kefir, sour cream, yoghurts (even if the packaging is not swollen, they can turn sour).
• 🍗 Meat and fish: often begin to deteriorate from the edges that are not visible under the film.
• 🥬 Greens and vegetables: onions, garlic, cabbage - when rotting, they release hydrogen sulfide (the smell of rotten eggs).
• 🍳 Sauces and open canned food: mayonnaise, ketchup, pickles in jars.
• 🧀 Cheeses: mold may not be visible from the outside, but the decomposition process has already begun inside.

If you find the source, throw away the product, but this is not enough! The smell has already been absorbed into the plastic and seals. Then proceed as follows:

Remove all food from the refrigerator|Wipe the shelves and walls with a soda solution (2 tablespoons per 1 liter of water)|Wash the sealing gum with soapy water|Put an open box of soda or activated carbon on the shelf for 12–24 hours|Check the drainage hole (more about it below)-->

⚠️ Attention: Never use chlorine-containing products (such as “White”) to clean the refrigerator - they react with plastic and can increase the smell. It’s better to take table vinegar (dilute 1:1 with water) or special detergents for refrigerators (for example, Topperr or Sano Fridge Cleaner).

2. The blockage of the drainage system is hidden threat

If there are no expired products, but the smell remains, the drainage hole is to blame. It is in every refrigerator (even in systems No Frostand serves to drain condensate over time, crumbs, food particles, mold get there - and all this begins to rot, releasing hydrogen sulfide.

How to check the drainage:

1. Unplug the refrigerator.
2. Locate the hole - usually it is located on the back wall of the refrigerator (in models with a drip system) or under the fruit boxes.
3. Take a flashlight and shine it inside. If you see black spots or mucus, this is. mold.
4. Carefully rinse the hole with warm water and soda, using a cotton swab or a special brush (available in cleaning kits, for example, Karcher).

What will happen if you do not clean the drain?

If you ignore the blockage, water will begin to accumulate at the bottom of the refrigerator, creating an ideal environment for the growth of bacteria. Over time, this will lead not only to an increase in odor, but also to corrosion of metal parts (in models with an open evaporator) or breakdown of the compressor due to increased load.

⚠️ Attention: In refrigerators with a system No Frost the drainage hole may be hidden behind the back panel. Do not try to remove it yourself - it is better to call a technician so as not to damage the system. ventilation.

3. Mold and bacteria are invisible enemies

Mold can appear even in a seemingly perfectly clean refrigerator. It loves damp and dark places: sealing rubber bands, the back wall, egg trays and some types of mold. (for example, Aspergillus) emit volatile compounds that smell like rotten meat.

Signs of mold:

• 🕵️ Black or green dots on the seal or in the corners of the chamber.
• 🤧 Allergic reactions in household members (sneezing, itchy nose after opening the refrigerator).
• 🌫️ White coating on food, especially bread or fruit.

How to get rid of it:

1. Remove all products and remove removable shelves/drawers.
2. Wash all surfaces with a solution of vinegar or hydrogen peroxide (3%). Use a toothbrush for the seal.
3. Dry the refrigerator for 1-2 hours with the door open.
4. Treat the surfaces with an antibacterial spray (for example, Mellerud for refrigerators).

Once a month|Once every 3-6 months|Once a year|Only when the smell appears|Never washed-->

4. Malfunction of the defrosting system - when the equipment itself is to blame

If your refrigerator s drip defrosting system (not No Frost), then condensation forms on the back wall, which flows into the drainage. If it breaks, this process is disrupted, and the water stagnates, creating a “swamp” with a corresponding odor. Frequent reasons:

• 🔧 Drainage tube clogged (we talked about it earlier).
• ❄️ Incorrect operation of the thermostat - the refrigerator does not cool enough, and food spoils faster.
• 💧 Freon leak - the compressor works without stopping, but the temperature in the chamber does not drop to the desired level level.

How to check:

1. Look if there is ice or abundant condensation on the back wall.
2. Check the temperature in the refrigerator compartment with a thermometer. Norm: +2…+5°C.
3. Listen to the operation of the compressor. If it turns on. 5-10 minutes and immediately turns off - there may be a freon leak.

⚠️ Attention: If you suspect a freon leak - do not try to repair it yourself. Freon is toxic, and its refilling requires special equipment. Contact a service center (for example, for refrigerators Atlant or Beko there are often branded workshops).

5. Problems with the sealing rubber band - why the smell comes back

The sealing rubber band (or, as the experts call it, “cuff”) loses its elasticity over time, cracks, or moves away from the body. Because of this, warm air penetrates into the refrigerator, creating areas with high humidity - an ideal place for bacteria. In addition, food debris and mold accumulate in the cracks of the rubber.

Signs of wear on the seal:

• 🔍 Visible cracks or tears.
• 💨 Condensation on the outside of the door.
• 📏 Gaps between the elastic and the body (check with a sheet of paper - if it pulls out easily when the door is closed, the seal is not airtight).

What to do:

1. Clean the elastic with a toothbrush and soapy water.
2. If there are small cracks, treat with silicone grease (for example, WD-40 Specialist).
3. If there is severe wear, replace the seal. For popular models (Samsung RB30J3000WW, LG GA-B489YDQL) they can be purchased separately.

6. The smell from new plastic parts - why it smells like “chemicals”

If the refrigerator is new or you recently replaced the shelves/drawers, the smell may come from the plastic itself (Indesit, Biryusa), where more is used. cheap materials. This smell is not rotten, but rather “chemical”, but when mixed with products it can give an unpleasant effect.

How to remove:

• 🧼 Wash the new parts with a solution of soda or vinegar.
• ☀️ Dry them on the balcony for 1-2 days (if the weather permits).
• 🍋 Place slices of lemon or orange peel in the refrigerator - they will absorb the chemical smell.

⚠️ Attention: If the “chemical” smell does not disappear for more than a week, this may be a sign poor quality plasticof formaldehyde release. In this case, it is better to return the refrigerator under warranty (if the period is not valid. expired) or contact a service center to check.

7. External reasons: ventilation, humidity, neighbors

Sometimes the source of the smell lies not in the refrigerator itself, but outside:

• 🌬️ Poor ventilation in the kitchen - odors from the stove or garbage penetrate into the refrigerator through the cracks.
• 💦 High humidity indoors (more than 60%) - promotes the growth of mold.
• 🏢 Odors from neighbors —if the refrigerator is located next to the ventilation shaft, foreign “odors” may be drawn into it.
• 🐭 Rodents or insects —mice may die behind the refrigerator, and ants or cockroaches may leave waste products in the drainage.

What to do:

1. Install a hood in the kitchen or ventilate it regularly.
2. Check the space behind the refrigerator for dead rodents or mold on the wall.
3. Use odor absorbers (for example, Air Wick for refrigerators).

FAQ: Frequently asked questions about the rotten smell in the refrigerator

❓ Why does the rotten smell appear again a week after cleaning?

Most likely, you have removed the effect, but not the cause. Check:

• Drainage hole - if it is clogged, the smell will return.
• Sealant - mold could remain in its folds.
• Temperature conditions - if the refrigerator does not work correctly, food will spoil faster.

Also pay attention on products with a strong odor (cheeses, sausages, fish) - it is better to store them in airtight containers.

❓ Is it possible to use fragrances for the refrigerator?

Yes, but avoid products with strong ones. fragrances - they can mix with the smell of products and give an unpleasant effect. The best options:

• Activated carbon (absorbs odors, but does not mask).
• Soda in an open container.
• Special absorbers (for example, Fridge Fresh).

⚠️ Do not use alcohol-based air fresheners - they can damage the plastic.

❓ Why does the No Frost refrigerator smell like rotten meat if there is no drainage hole?

In the systems No Frost there is drainage, but it is hidden behind the back panel. Smell. may come from:

• Evaporator - if it is frozen or covered with mold.
• Fan - dust and grease accumulate on its blades.
• Condensate, which does not have time to evaporate due to a breakdown of the defrost heater.

In this case, you cannot do without a technician - disassembling the system yourself is dangerous.

❓ How often should you wash the refrigerator to avoid smell?

Optimal frequency:

• General cleaning (with removing shelves) - once every 3 months.
• Wipe the shelves - once every 2 weeks.
• Cleaning the drainage - once every 6 months.
• Checking the seal - once every month.

If there are allergy sufferers or small children in the house, it is better to clean more often.

❓ What to do if the smell has penetrated the plastic and does not disappear?

Try it deep cleaning:

1. Prepare a solution: 1 liter of water + 2 tablespoons of soda + 1 tablespoon of ammonia.
2. Wipe all surfaces, including the seal.
3. Leave the refrigerator open for 12 hours inside a bowl of vinegar.
4. If that doesn’t help, use professional products, for example, OdorGone.

In extreme cases, you may need to replace the plastic panels (relevant for older models).