Why the refrigerator makes noise and how to fix it: a detailed guide

Modern refrigerators operate almost silently, but even new models sometimes begin to hum, knock or vibrate. If your unit makes suspicious sounds, this is not always a reason to panic. In 80% of cases, the problem can be fixed on your own, without resorting to the help of a specialist. The main thing is to correctly diagnose the cause.

In this article we will analyze all possible sources of noise: from a banal housing misalignment to compressor malfunctions. You will learn what sounds are considered normal for refrigerators of different brands (Samsung, LG, Indesit, Atlant), and when to sound the alarm. We will also give step-by-step repair instructions with photos and videos, checklists for diagnostics and tips for prevention.

We warn you right away: some manipulations (for example, disassembling a compressor) require experience. If you are not confident in your abilities, it is better to call a specialist. But most causes of noise can be eliminated in 10-30 minutes without tools.

1. Normal and abnormal sounds of a refrigerator

Before sounding the alarm, determine what kind of noise your refrigerator makes. Some sounds are part of the normal operation of the unit:

• 🔊 Quiet humming (25-45 dB) - compressor operation. In new models with an inverter engine (Samsung Digital Inverter, LG Linear Compressor), the noise is almost inaudible.
• 💨 Rustling or gurgling is the circulation of refrigerant through the tubes. It is especially noticeable in the first hours after switching on.
• 🔄 Relay clicks - activation of the starting device when starting/stopping the compressor. The norm for models with electromechanical control.

But these sounds should alert you:

• 🚨 Loud rattling - often caused by vibration of tubes or improper installation.
• ⚠️ Knocking or clanging — may indicate a breakdown of the fan or compressor.
• 🔥 Whistling or hissing —freon leakage or problems with the capillary tube.
• 🌀 Constant hum without pauses —the compressor is working for wear (risk overheating).

Please note: in refrigerators with a system No Frost (for example, Bosch KGE39XW2AR or Liebherr CN 4015), the fan may periodically emit a weak noise when defrosting. This is normal if the sound is not constant.

⚠️ Attention: If the refrigerator starts making noise after moving, defrosting or power outage, first check to see if the food inside has moved. Sometimes bottles or cans vibrate against the walls, creating the illusion of breakage.

2. Reason No. 1: incorrect installation of the refrigerator

In 40% of cases, the noise is caused by a banal misalignment of the case or an uneven floor. Even a slight tilt of 1-2° can lead to compressor vibration and pipe rattling. It's easy to check:

Check the floor level with a building level or an application on your smartphone|

Open the door - if it closes or opens on its own, the body is skewed|

Look at the gaps between the door and the body - they should be the same around the entire perimeter|

Try to rock the refrigerator with your hands - if it wobbles, you need to adjust the legs-->

How to fix:

1. Unplug the refrigerator and pull it out of the niche.
2. Rotate front adjustable leg (usually it is threaded) until until the body is level. Some models (Atlant, Stinol) have all 4 legs adjustable.
3. Check that the back wall of the refrigerator does not touch the wall or furniture. The minimum gap is 5 cm..
4. If the floor is uneven, place rubber pads or special anti-vibration stands under the legs.

For refrigerators with No Frost system it is especially important to maintain clearances - the fan must be freely blown by air. In models Samsung RB37J5230SA or LG GA-B489YQPL poor ventilation may cause additional noise due to overheating.

3. Reason No. 2: vibration of tubes and compressor

The refrigerator compressor vibrates during operation - this is normal. But if vibration is transmitted to the body or the tubes begin to rattle, the noise increases significantly. Most often this happens due to:

• 🔧 Loose compressor mounts (rubber shock absorbers are worn out).
• 🔗 Touching the tubes against the back wall or each other.
• 🧲 Magnetic resonance (rare, but found in older models).

How to fix:

1. Unplug the refrigerator and carefully move it away from the wall.
2. Inspect compressor (black cylinder at the bottom). It must be mounted on spring or rubber shock absorbers. If they are torn, they need replacement.
3. Check copper tubes (thin and thick). They should not touch each other or the body. Gently bend them with your hands.
4. If the tubes vibrate strongly, secure them with plastic clamps or foam rubber.

For refrigerators Samsung i LG with inverter compressors (Digital Inverter, Linear Compressor), vibration should be minimal. If the noise does not decrease after fixing the tubes, the compressor itself may be faulty.

⚠️ Attention: Do not use metal clamps or tape to secure the tubes! They can damage copper tubing or insulation. It is better to take soft plastic ties or polyurethane foam pads.

What to do if the compressor gets hot and makes noise

If the compressor not only vibrates, but also gets very hot (more than 60°C), this may indicate:

1) System overload (for example, when continuous operation due to a faulty thermostat).

2) Lack of refrigerant (freon).

3) Clogged capillary tube.

In these cases, professional diagnostics are needed.

4. Reason No. 3: fan malfunction (for No Frost)

Refrigerators with a system No Frost (for example, Bosch KAN92VI30R, Electrolux ENN2853AOW) are equipped with a fan to distribute cold air evenly. If it starts to make noise, this may be caused by:

• 🍂 Clogged blades (dust, ice, pieces of food).
• 🔄 Wear of bearings (creaking or humming appears).
• 🧊 Icing (the fan scratches the ice).

How to fix:

1. Unplug the refrigerator and defrost it for 12-24 hours.
2. Remove the back panel in the freezer (usually it is secured with latches or screws).
3. Clean the fan blades from ice and dirt. To do this, use a soft brush or vacuum cleaner at minimum power.
4. Check whether the fan rotates freely. If it jams, it needs replacement.

In models Samsung i LG the fan is located behind the back wall of the freezer. It may be located in the upper part of the refrigerator compartment. For the exact location, see the instructions for your model. Bosch And Siemens it may be located at the top of the refrigerator compartment. See the instructions for your model for the exact location.

If after defrosting the fan does not start or makes more noise, this is a sign of a motor malfunction. In this case, the entire assembly must be replaced, since the bearings cannot be repaired.

5. Reason No. 4: problems with the compressor

The compressor is the “heart” of the refrigerator, and its malfunctions are manifested not only by noise, but also by poor cooling. Common problems:

• 🔋 Wear of the piston group —a knocking or clanging sound appears.
• 🔥 Overheating —the compressor hums without stopping.
• ⚡ Problems with the starting relay —clicks without starting motor.

Diagnostics:

1. Listen to the nature of the noise:
   • Metallic knocking - wear of pistons or valves.
   • Loud humming without pauses - the compressor is wearing out.
   • Clicks every 5-10 seconds - the relay is faulty.

Check the temperature of the compressor. Normally, it should be warm (40-50°C), but not hot.

Evaluate the cooling efficiency. If the refrigerator does not freeze well and the compressor is noisy, it most likely needs replacement.

Independent repair of the compressor is only possible with replacement start relay (the part costs 500-1500 ₽). In other cases, a call to a specialist is required, since special tools are needed to evacuate the system and refill freon.

⚠️ Attention: If the compressor smokes, sparks or smells like burning -immediately disconnect the refrigerator from the network! These are signs of a short circuit that can lead to a fire.

6. Reason No. 5: clogged capillary tube

The capillary tube is a thin channel through which the refrigerant enters the evaporator. If it becomes clogged, the compressor will overwork, causing a loud hum. Signs of clogging:

• 🔊 Constant compressor noise without pauses.
• ❄️ The freezer is working, but the refrigerator is not.
• 🌡️ The temperature in the compartments is rising despite continuous operation motor.

What to do:

Unfortunately, cleaning the capillary tube is a complex procedure that requires:

• Special equipment (vacuum pump, pressure gauges).
• Experience in working with refrigerants (freon under pressure!).
• Soldering copper pipes.

If you suspect a blockage, it is better to call a specialist. The average cost of cleaning is from 2500 to 5000 ₽ depending on the model. In some cases, it is cheaper to replace the refrigerator, especially if it is more than 10 years old.

In refrigerators Indesit i Ariston clogging the capillary is one of the most common causes of noise. This is due to the design features of the evaporator.

7. Reason No. 6: wear of rubber seals

Rubber gaskets on the door lose their elasticity over time, which is why the refrigerator begins to make noise for two reasons:

1. Constant operation of the compressor. If the seal is not airtight, warm air gets inside, and the refrigerator tries to compensate for this by working harder.
2. Door rattling. A loose seal does not secure the door tightly, and it vibrates when the compressor operates.

How to check the seal:

• 📏 Insert a sheet of paper between the door and the body. If it falls out or is easily pulled out, the seal is worn out.
• 👀 Inspect the rubber for cracks, tears or deformations.
• 🧼 Wash the seal with warm water and soap - sometimes it sticks due to grease or dirt.

If The seal is damaged and needs to be replaced. The cost of new tires is from 800 to 3000 rubles, depending on the model. For refrigerators Samsung i LG seals are often sold complete with the door.

8. Reason No. 7: external factors (socket, network, furniture)

Sometimes the refrigerator makes noise through no fault of its own. Check these points:

• 🔌 Unstable voltage. If there are frequent surges in the network, the compressor may hum more than usual. The solution is to connect the refrigerator through voltage stabilizer.
• 🪑 Contact with furniture. If the refrigerator is close to a cabinet or wall, the vibration increases. Move it 5-10 cm.
• 🔊 Resonance with other appliances. For example, if there is a washing machine or microwave nearby, their vibrations can increase the noise of the refrigerator.

Also check the outlet. If it is old or loose, the contacts may spark, causing the compressor to overheat. In this case, replace the outlet or use a surge protector.

⚠️ Attention: Do not connect the refrigerator through an extension cord! This may cause the cable to overheat and short circuit. If the outlet is far away, use an extension cord with a wire cross-section of at least 1.5 mm² and grounding.

FAQ: Frequently asked questions about refrigerator noise

❓ Why is the new refrigerator noisier than the old one?

Modern models (especially with No Frost) have more powerful fans and compressors, which may seem noisier at first. Also, new refrigerators often use inverter compressor, which operates without pauses, but at low speeds. Getting used to it takes 1-2 weeks. If the noise has not decreased, check the installation and ventilation.

❓ Is it possible to replace the compressor yourself?

Theoretically yes, but in practice it is difficult. You will need:

• A special tool for soldering copper tubes.
• A vacuum pump for pumping air out of the system.
• A freon cylinder and pressure gauges for refilling.
• Knowledge of the connection diagram (for different models it is different).

Errors during replacement can lead to freon leakage or damage to the new compressor. If you do not have experience, it is better to entrust this to a specialist.

❓ Why does the refrigerator make noise at night, but not during the day?

This is due to two factors:

1. Silence in the room. At night there are no extraneous sounds, so the noise of the refrigerator is heard more clearly.
2. Operating mode. At night, the temperature in the room is usually lower, and the compressor turns on less often, but runs longer (to maintain the set temperature). This can create the illusion of a “night hum.”

Check whether the refrigerator is touching furniture or walls at night (due to the expansion of materials when the temperature changes).

❓ How to reduce the noise of a refrigerator without repair?

If the cause of the noise is not critical, try these methods:

• 📦 Rearrange the food inside so that they do not touch the walls.
• 🧲 Place rubber pads under the legs (sold in household appliance stores).
• 🔇 Install the refrigerator away from the bedroom or kitchen (if dimensions allow).
• 🌡️ Reduce the temperature in the freezer by 1-2°C - this will shorten the operating time of the compressor.

❓ When is the noise of a refrigerator a reason for warranty repairs?

According to the law "On the Protection of Consumer Rights" you can demand free repair or replacement of the refrigerator if:

• The noise exceeds the standards stated in the passport (usually 38-45 dB).
• The refrigerator is noisy from the first day and this is not due to improper installation.
• The cause of the noise is a manufacturing defect (for example, a defect in the compressor or fan).

For this you need to:

1. Contact the brand's service center with a receipt and passport.
2. Provide a recording of the noise (can be done on the phone).
3. Request an examination if the seller refuses to acknowledge the defect.

The warranty period for refrigerators is usually 1-3 years (check in the documents).