The refrigerator began to work loudly - we understand the reasons and eliminate the noise

Have you noticed that your refrigerator has started to work louder than usual? Extraneous sounds - from humming and vibration to knocking and grinding - can signal both minor problems and serious malfunctions. In this article we will analyze all possible causes of increased noisefrom a banal misalignment to compressor failure, and give step-by-step instructions on how to diagnose and fix the problem yourself.

It is important to understand that modern refrigerators (even with the system No Frost) do not work absolutely silently. The normal noise level for most models is from 35 to 45 dB, which is comparable to a quiet conversation. But if the sound has become intrusive, or uncharacteristic vibrations or squeaks appear, this is a reason to check the equipment. Let's start with the simplest and most obvious reasons - perhaps the problem can be solved in 5 minutes without calling a technician.

1. The refrigerator is not level - the most common cause of vibration

If your refrigerator is buzzes and vibrates, the first thing you need to check is its position relative to the floor. Even a slight misalignment of 1-2 degrees can cause strong vibration of the compressor, which is transmitted to the housing and amplified by resonance. This is especially true for models with linear compressors (for example, LG Inverter Linear or Samsung Digital Inverter), which are sensitive to tilt.

How to check levelness of installation:

• 📏 Use a building level (you can use a free application on your smartphone). Check the horizontal position along the top cover and the vertical position along the side walls.
• 🔧 Tighten the adjustable legs (usually at the front) so that the refrigerator is strictly level. If there are no legs, place a rubber gasket under one side.
• 🚫 Make sure that the refrigerator does not touch the walls or furniture. The minimum gap is 5 cm at the back and 2 cm at the sides.

After leveling, let the refrigerator run for 10-15 minutes. If the vibration disappears, the problem is solved. If not, go to the next point.

2. Condenser contamination - why the refrigerator hums loudly

The condenser (or “radiator”) is located on the back wall of the refrigerator and is responsible for cooling the freon. If it is clogged with dust, animal hair or poplar fluff, the compressor begins to wear outwhich leads to increased noise. In advanced cases, this can cause overheating and damage to the motor.

How to clean the condenser:

1. Unplug the refrigerator and move it away from the wall.
2. Take a vacuum cleaner with a narrow attachment or a soft brush. Never use metal objects or hard brushes - they can damage the condenser tubes.
3. Carefully remove dust between the radiator fins. For hard-to-reach places, a can of compressed air (available in electronics stores) is suitable.
4. Wipe the back wall with a damp cloth and let dry.

Recommended cleaning frequency - every 6 months. If there are animals in the house or you live on the lower floors (where there is more dust), clean the condenser every 3 months.

3. Fan malfunction is the source of creaking and crackling

In refrigerators with a system No Frost (for example, Indesit NBA 18, Bosch KGE39XW2AR) the fan is responsible for air circulation. If it starts to creak, crackle or periodically stop, this may indicate:

• 🍂 Entry of foreign objects (pieces of food, ice, plastic from packaging).
• 🧊 Icing of the blades due to a malfunction of the defrosting system.
• 🔧 Bearing wear or fan motor.

How to diagnose the problem:

1. Open the freezer and listen. If the noise increases when the door is open, the problem is in the fan.
2. Shine a flashlight on the blades. Do you see ice or foreign objects? Carefully remove them with a plastic spatula (not metal!).
3. If the blades are clean, but the fan does not spin or spins jerkily, replacement will be required.

What to do if the fan is frozen?

Turn off the refrigerator for 12-24 hours to completely defrost. If ice appears again, the defrost heater or thermostat is faulty. In this case, professional diagnostics are needed.

⚠️ Attention: If the fan has completely stopped and the refrigerator continues to work, this can lead to overheating of the compressor. In this case, it is better to call a specialist.

4. Problems with the compressor - when the hum becomes constant

The compressor is the “heart” of the refrigerator, and its malfunctions appear constant loud hum, which does not stop even in standby mode. Possible reasons:

• 🔋 Wear of the motor (typical for refrigerators over 10 years old).
• 🛢️ Freon leak - the compressor works non-stop, trying to catch up with the cold.
• 🔌 Malfunction of the start relay (clicking sounds when turned on).
• 🌡️ Thermostat failure - the compressor does not turn off because it does not receive a signal that the desired temperature has been reached.

It is almost impossible to repair the compressor yourself - replacement or refilling will be required freon. However, you can carry out preliminary diagnostics:

⚠️ Attention: If the compressor overheats (the body is hot to the touch), immediately unplug the refrigerator. Further operation in this mode may lead to a fire.

5. Noise from pipes and freon circulation

Sometimes the refrigerator makes noise gurgling, hissing or clicking sounds this is normal if they are short-term. This is how freon circulates through the system. However, if the sounds become constant or too loud, this may indicate:

• 💧 Clogged filter drier - Freon cannot circulate freely.
• 🔗 Moisture entering the system - audible squelching sounds.
• 🧊 Formation of an ice plug in the capillary tube (typical for models with crying evaporator).

What can be done yourself:

1. Turn off the refrigerator for 12 hours to completely defrost. Sometimes this helps eliminate the ice jam.
2. Check whether the freon pipe (tubes on the rear wall) is pinched. If yes, carefully straighten them.
3. If the sounds do not disappear, call a technician to diagnose the cooling system.

⚠️ Attention: Do not try to clean the tubes or add freon yourself. This requires special equipment and can be dangerous!

6. Problems with compressor shock absorbers

The compressor is attached to the refrigerator frame through rubber shock absorbers that dampen vibration. Over time, the rubber hardens, cracks or comes off - and then each motor cycle is accompanied by a loud knocking or rattling sound..

How to check shock absorbers:

1. Unplug the refrigerator and carefully move it away from the wall.
2. Inspect the rubber cushions under the compressor (usually black).
3. If they are torn, deformed or missing, replacement is required.

The cost of new shock absorbers is from 200 to 800 ₽ per set. You can replace them yourself if you have experience working with tools. Otherwise, it is better to contact a service center.

7. Noise from the ice maker or water dispenser

If your refrigerator is equipped with ice maker (for example, Samsung RF23A9671SG or Liebherr ICBN 3366), then extraneous sounds may come from:

• 🍦 Water supply pump - hum or buzzing when drawing water.
• ❄️ Ice crushing mechanism -crackling or grinding.
• 💧 Clog in the water main —gurgling or hissing.

How to eliminate the noise:

1. Check that the water filter (if any) is installed correctly.
2. Make sure that the water supply hose is not is bent.
3. If the ice in the dispenser is caked, remove it manually and restart the ice maker (instructions are usually in the user manual).

If the noise does not disappear, the pump or water level sensor may be faulty. In this case, only replacing the part will help.

8. When to call a technician - signs of serious damage

Some malfunctions require professional repair. Contact the service center if:

• 🔥 The compressor overheats (the housing is hot, it smells like burning).
• ❄️ The refrigerator does not freeze, but the motor runs without stopping.
• ⚡ When turned on, it works. UZO or knocks out the machine.
• 💥 Popping or explosive sounds are heard (possible freon leak).
• 🔧 An error appears on the display (for example, E1, F2 or ALARM).

The cost of repair depends on the type of breakdown:

⚠️ Attention: If the refrigerator is under warranty, do not try to repair it yourself. This may lead to loss of warranty.

FAQ: Frequently asked questions about refrigerator noise

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

Modern models are often equipped with inverter compressors, which regulate power smoothly, and do not turn on/off as in old refrigerators. Because of this, it may seem that they are working constantly. However, the noise level of new models is usually lower (30–40 dB versus 45–55 dB for old ones).

If the noise is really strong, check:

• The installation is correct (see section 1).
• Presence of transport bolts (they must be removed before turning on for the first time!).
• Operating mode (possibly the mode Super Freeze or Holiday).

❓ Is it possible to fill the refrigerator with freon yourself?

No. Filling with freon requires:

• Special equipment (vacuum pump, manometric manifold).
• Knowledge about the types of freon (for example, R134a, R600a, R290).
• Safety precautions (freon is explosive if leaked!).

Incorrect filling can lead to a breakdown of the compressor or a gas leak. Contact a professional.

❓ The refrigerator began to make noise after moving. What to do?

Probable reasons:

1. Transport bolts not removed —they fix the compressor during transportation. Removal instructions are in the user manual. data-i="217">Transport bolts have not been removed
2. The freon pipe is damaged —if the refrigerator has been dropped or hit. Signs: noise + lack of cold.
3. Internal parts have shifted (for example, the fan in models No Frost).

First check the bolts, then level the refrigerator. If the noise does not disappear, call a technician.

❓ Why does the refrigerator operate loudly at night?

This may be due to:

• 🌡️ Increasing the temperature in the room (for example, if the kitchen is not ventilated). The compressor turns on more often.
• 🔇 Silence in the house - during the day the noise is masked by other sounds.
• ⚡ Night electricity tariff - some refrigerators (for example, Samsung Family Hub) activate energy-intensive modes at night.

Solution: check the temperature in the kitchen (optimally - 18–22°C) and adjust the operating mode of the refrigerator.

❓ How many dB should a normal one emit? refrigerator?

The noise level depends on the type of compressor and model:

• Regular compressor: 40–45 dB (comparable to a quiet conversation).
• Inverter compressor: 30–40 dB (almost silent).
• No Frost system: up to 48 dB (due to fan operation).

If the noise exceeds 50 dB, this is a reason for diagnosis.