How to remove fungus in a refrigerator: 10 proven methods and rules prevention

Black dots on the seal, an unpleasant odor from the chamber or a slippery coating on the shelves - all these are signs that there is a fungus in your refrigerator. Mold not only spoils the appearance of equipment, but is also dangerous to health: its spores can cause allergies, poisoning and even chronic diseases. The fungus multiplies especially quickly in refrigerators with a No Frostsystem, where humidity is distributed unevenly, and in old models with manual defrosting, where condensation often accumulates.

In this article you will find step-by-step instructions on removing mold from plastic, rubber and metal parts of the refrigerator, a comparison of the effectiveness of folk and professional tools, as well unique tips for preventionthat you will not find in standard recommendations. For example, why you can’t wash the seal with hot water and how to properly dry the chambers after cleaning so that the fungus does not return in a week.

Causes of fungus in the refrigerator

Mold in the refrigerator is not an accident, but the result of a combination of factors. The main reason is high humidity (above 60%), which occurs due to:

• 💧 Improper food storage: open containers with soups, fruits/vegetables in plastic bags, wet greens.
• ❄️ Irregular defrosting: in models without No Frost ice melts unevenly, moisture flows down the bottom of the chamber.
• 🔧 Wear seal: cracks in the rubber allow warm air to pass through, creating condensation.
• 🧊 Frequent opening of the door: temperature changes lead to the formation of drops on the walls.

The second key reason is pollution. Crumbs, spilled liquids and food debris become a breeding ground for fungal spores. It is especially dangerous to store in the refrigerator expired products or those that have already begun to deteriorate (for example, moldy cheese or bread). Mold spores are easily transported through the air and settle on all surfaces.

The risk of fungus also increases if:

• 📅 The refrigerator has not been washed for more than 3 months.
• 🌡️ The temperature in the chamber is above +5°C (optimally +2...+4°C).
• 🚫 The ventilation holes (in models with No Frost) are clogged with dust.

⚠️ Attention: If the fungus appears on the back wall of the refrigerator (where the drainage holes), this may signal about clogged drain. Water does not go into the pan, accumulates inside and creates ideal conditions for mold. In this case, it is not enough just to wash the surface - you need to clean the system (read about this in the section on deep cleaning).

What is the danger of fungus in the refrigerator for health

Mold is not just an aesthetic problem. Its spores can cause:

• 🤧 Allergic reactions: sneezing, itchy nose, red eyes (especially in children).
• 💊 Poisoning: some types of mold (for example, Aspergillus) release toxins that accumulate in products.
• 🫁 Respiratory diseases: chronic cough, bronchitis, exacerbation of asthma.
• 🦠 Infections: in people with weakened immune systems, the fungus can affect the skin and mucous membranes.

It is especially dangerous if mold gets on food. For example, meat or milk stored next to a moldy shelf can absorb toxins even without visible signs of spoilage. At the same time boiling does not always kill spores —some of them are resistant to high temperatures.

According to WHO, long-term exposure to household mold increases the risk of developing chronic pulmonary diseases by 30–50%. Therefore, you need to remove the fungus immediately after detection, and not wait until it spreads to all surfaces.

Preparing the refrigerator for cleaning: step-by-step instructions

Before you begin to remove the fungus, the refrigerator must be properly prepared. If you skip this step, cleaning will be ineffective, and the mold will return in a few days.

Unplug the refrigerator and defrost (if there is ice)

Remove all products and shelves (check expiration dates!)

Remove the rubber seal (if possible) or bend it back it to access the grooves

Prepare detergents and tools (brushes, sponges, gloves)

Place a container to collect dirty water (if you wash the drainage)-->

Step 1. Defrost and ventilate. If there is ice in the refrigerator, let it melt naturally (do not use a hairdryer or hot water - this may damage the plastic). After defrosting, leave the door open for 1-2 hours to allow the moisture to evaporate.

Step 2. Removing food. Remove all contents, check expiration dates and throw away suspicious foods (especially open sauces, milk, meat). Food in airtight containers can be temporarily placed in a cooler bag or wrapped in a towel and taken out to the balcony (if it’s cool outside).

Step 3. Dismantling removable parts. Remove all shelves, drawers, grilles and seal (if it is removable). In some models (for example Samsung RB30J3000 or LG GA-B489SLGL) the seal is secured with latches - carefully pry it off with a screwdriver. Glass shelves can be washed separately in the sink, and it is better to clean plastic parts in place so as not to scratch them.

⚠️ Attention: Do not use for cleaning the refrigerator abrasive sponges (metal or hard synthetic). They scratch the surface, and in microcracks the fungus multiplies even more actively. The best option is a soft microfiber cloth or dish sponge marked “soft”.

Top 5 folk remedies for removing fungus

If mold appears recently and has not had time to spread much, you can do without aggressive chemicals. Folk remedies are safe for health and do not leave toxic fumes, but require more time to act.

How to enhance the effect? For complex cases, you can combine products. For example:

1. First wipe the surfaces vinegar (kills spores).
2. Apply after 30 minutes soda (neutralizes the smell and mold residues).
3. Finally treat peroxide (lightens dark spots).

Professional products: what to choose for deep cleaning

If traditional methods did not help or mold covers large areas (for example, the entire back wall), it’s time to move on to the “heavy artillery.” Professional products are divided into 3 groups:

• 🧴 Specialized antiseptics for refrigerators: Top House, Unicum, Cillit Bang (Anti-mold series). They contain fungicides that destroy fungus at the cellular level.
• 🧪 Chlorine-containing products: "Whiteness", Domestos. They are effective, but require careful rinsing (chlorine can be absorbed into plastic and spoil food).
• 💊 Tablets for disinfection: "Septolite" or "Aquatabs". Dissolves in water, suitable for soaking removable parts.

How to use? Instructions for most products:

1. Apply the product to the surface (spray or sponge).
2. Leave for 15-30 minutes (the exact time is indicated on the package).
3. Rinse thoroughly with clean water 2-3 times.
4. Wipe dry and ventilate the refrigerator for 4-6 hours.

For hard-to-reach places (for example, drainage holes or seal grooves), use bottle brush or a toothbrush dipped in antiseptic. In some models (for example Indesit BIAA 13), the drainage hole is located under the bottom shelf - it must be cleaned at least once every 3 months.

⚠️ Attention: Never mix different professional products (for example, bleach and ammonia) - this can lead to data-i="188">or the release of toxic gases. Also avoid products with abrasive particles (such as chemical burn or release of toxic gases. Also avoid products with abrasive particles (such as "Pemolux") - they scratch the coating of the refrigerator.

What to do if the fungus returns after a week?

If mold appears again, the problem lies deeper:

1. Clogged drainage system —the water does not go away, accumulates at the bottom (you need to clean the tube with wire).

2. Thermostat malfunction —the temperature in the chamber is higher than normal (check the setting or call a technician).

3. Bad ventilation —in models with No Frost the air filter could be clogged (needs to be replaced).

4. Hidden hot spots —fungus can sit under plastic panels or in the engine compartment (disassembly required).

How to clean the drainage hole and other hard-to-reach places

If the fungus appears on the back wall of the refrigerator or underneath drawers for vegetables, most likely the problem is drainage system. Water does not flow into the pan, but stagnates inside, creating an ideal environment for mold.

Cleaning tools:

• 🧼 Toothbrush or brush.
• 💦 Syringe (20 ml) or syringe.
• 🔧 Wire (diameter 1–2 mm) or a special cable for cleaning pipes.
• 🧴 Antiseptic ("Whiteness" or "Cillit Bang").

Step-by-step instructions:

1. Turn off the refrigerator and remove all shelves.
2. Find the drainage hole (usually in the center of the back wall or under the bottom shelf).
3. Rinse using a syringe hole with warm water (you can add a little vinegar).
4. If the water does not go away, clean the tube with wire (carefully so as not to damage the plastic!).
5. Pour 10-15 ml of antiseptic into the hole, wait 10 minutes and rinse with clean water.
6. Check if it goes away There is water in the tray (place a napkin - it should remain dry).

In refrigerators with a system No Frost the drainage tube may clog more often due to constant air circulation. If cleaning does not help, it may be necessary to replacing the tube or repair the evaporator (this is a job for a master).

Fungus prevention: 7 rules that work

Removing mold is only half the battle. To prevent it from returning, you need to follow simple but effective rules:

• 📅 Regular cleaning: wash the refrigerator every 1-2 months (even if there is no visible mold, use a soda solution or). vinegar.
• 🍎 Proper storage of food: meat and fish - in sealed containers, fruits/vegetables - in special boxes (not in bags!).
• 🌡️ Temperature control: in the main chamber it should be +2...+4°C, in the freezer - −18°C. Use a thermometer to check.
• 🔄 Ventilation: do not place the refrigerator close to the wall (there should be a 5-10 cm gap) and do not block the ventilation grates.
• 🚫 Dryness: after washing or defrosting wipe everything thoroughly surface (especially the seal!). Moisture is the main enemy.
• 🧊 Defrosting: even in models with No Frost every six months, do a “general cleaning” with complete shutdown.
• 🛠️ Fault prevention: check the seal for cracks and clean the drainage in a timely manner.

Another secret: put it in the refrigerator natural odor absorber. It could be:

• 🍋 Lemon slices (change once a week).
• ☕ Ground coffee in an open jar.
• 🧂 Soda in a small container (absorbs moisture and odors).

If your refrigerator has a function Air Filter or Deo Fresh (for example, in models Samsung RB37J5230 or LG GB-B539SLQZ), do not forget change filters every 6-12 months. They trap mold spores and bacteria, but over time they themselves become a breeding ground for fungus.

What to do if fungus has penetrated into engine compartment

In advanced cases, mold can spread outside the chamber - into the engine compartment or to the back wall of the refrigerator. This is a dangerous situation, since:

• The fungus can damage wire insulation, which will lead to a short circuit.
• Spores will constantly spread throughout the chamber through the ventilation (in models with No Frost).
• Mold on the condenser worsens heat transfer, which is why the refrigerator runs louder and consumes more electricity.

Signs that there is fungus in the engine compartment:

• The smell of mold can be felt even after washing the chamber.
• Black dots are visible on the back wall of the refrigerator (outside).
• The refrigerator has become stronger rattle or work longer.

What you can do yourself:

1. Unplug the refrigerator and move it away from the wall.
2. Carefully remove the back cover (in some models it is secured with latches, in others with screws).
3. Vacuum the engine compartment (use a soft brush attachment).
4. Wipe visible surfaces with a solution of vinegar or peroxide (do not pour liquid on parts!).
5. Leave the refrigerator to ventilate for 12-24 hours.

⚠️ Attention: If the fungus has penetrated deep into the insulation or onto the electronic boards, do not try to clean them yourself - this can lead to breakdown. In such cases, you need to call a technician from the service center. Also, do not use water under pressure to clean the engine compartment (for example, from a spray bottle) - this is dangerous for electrical equipment!

After cleaning, replace the back cover and check the operation of the refrigerator. If the smell of mold remains or new foci of fungus have appeared, you will most likely need replacing thermal insulation or parts of the ventilation system.

FAQ: Frequently asked questions about fungus in the refrigerator

Can I use bleach to clean the refrigerator?

Yes, but with caution. "Whiteness" or other chlorine-containing products are effective against mold, but:

• They need to be carefully wash off (chlorine can be absorbed into plastic and spoil products).
• Cannot be used for aluminum parts (chlorine oxidizes them).
• After cleaning, the refrigerator must be ventilated at least 6 hours.

It is better to choose specialized products (for example, "Unicum" or "Cillit Bang Anti-mold"), which are less aggressive, but no less effective.

Why does fungus appear even after cleaning?

If mold returns, it means you have eliminated the effect, but not the cause. The most common mistakes:

• 🔹 Not cleaned drainage hole (water accumulates at the bottom).
• 🔹 In the refrigerator high humidity due to a faulty seal or frequent door openings.
• 🔹 Mold remains in hard-to-reach places (under plastic panels, in the grooves of the seal).
• 🔹 After washing the surface badly dried.

Check all these points and repeat cleaning taking into account errors. If the problem repeats, it is possible that the refrigerator is installed incorrectly (for example, it is not level and the condensate does not flow into the drain).

How to clean a refrigerator with a No Frost system?

In refrigerators with No Frost fungus most often appears due to contamination of the ventilation ducts or a malfunction of the defrosting system. To clean such a refrigerator:

1. Unplug it and remove all the food.
2. Remove protective cover on the back wall (in some models it snaps off easily).
3. Vacuum ventilation grilles and channels (use a soft brush attachment).
4. Wipe all surfaces antiseptic (for example, "Cillit Bang").
5. Check evaporator (it is located behind the back panel) - if there is mold on it, it needs professional cleaning.

In models with No Frost Do not use abrasive agents - they will damage the antibacterial coating on the walls. Also, avoid large amounts of water when washing (it can get into the ventilation ducts).

Is it possible to use a steam generator for disinfection? refrigerator?

Yes, but with caution. The steam generator kills fungal spores well and disinfects surfaces, but:

• 🔹 Do not direct the steam stream at seal —it may become deformed.
• 🔹 Do not use steam on electronic panels (in refrigerators with a display).
• 🔹 After treatment dry thoroughly all surfaces (steam increases humidity).

Optimal mode for the refrigerator: steam temperature no higher 100°C, the distance from the nozzle to the surface is 15–20 cm. After treatment, wipe the walls with a dry cloth and leave the refrigerator open for 2–3 hours.

What foods cannot be stored in the refrigerator to avoid fungus?

Some products create ideal conditions for mold. Avoid storage in the refrigerator:

• 🍞 Bread (especially in a plastic bag) - it is better to keep it in a bread bin.
• 🍌 Bananas, pineapples, mangoes —they emit ethylene, which accelerates the spoilage of other products.
• 🧀 Cheeses in a vacuum packaging after opening, transfer to a container.
• 🥕 Root vegetables (potatoes, beets, carrots) —store in a cool, dark place.
• 🍅 Tomatoes —at temperatures below +12°C they lose their taste and rot faster.
• 🧅 Onions and garlic —they leave a persistent odor that is absorbed into the plastic.

Also do not store in the refrigerator opened canned food (the metal oxidizes) and hot dishes (steam increases humidity).