Loud sound in the refrigerator: 12 reasons and what to do about them

Did your refrigerator suddenly start making unusual sounds - humming, crackling, knocking or even grinding? Don’t rush to panic: in 80% of cases it’s not a breakdown, but the operating features of the equipment. But you can’t ignore noise either - it can signal an imminent malfunction or improper operation.

In this article we will analyze all the possible causes of loud sounds - from harmless (for example, refrigerant seething in new models) to critical (compressor failure). You will learn how to distinguish normal from malfunction, when you can handle it yourself, and when you need to call a specialist. And also - why modern refrigerators with the No Frost system are often louder than older models, and how to fix it without repair.

For convenience, we have collected all the sounds in a table describing the reasons, added interactive checklists and warnings about common errors. If after reading there are still doubts, at the end of the article there is a FAQ with answers to frequently asked questions from users.

1. Normal refrigerator sounds: when there is no need to worry

Not every noise is a sign of a breakdown. Modern refrigerators are equipped with several systems that can make sounds during operation. Here is what is considered the norm:

• 🔊 Quiet humming of the compressor — cyclic on/off of the motor (usually lasts 10–20 minutes, then a pause). In new models Samsung and LG compressors operate almost silently, but in old ones Atlant or Indesit they can buzz loudly.
• 💧 Gurgling or overflowing of liquid — movement of refrigerant (freon) through the tubes. It is especially noticeable in the first hours after switching on or when the temperature changes.
• ❄️ Crackling or crackling is the sound of plastic parts when the temperature changes (case, shelves, seals). More often heard in the freezer.
• 🌀 Fan noise - in models with No Frost the fan turns on periodically to distribute the cold evenly.

These sounds are usually no louder than 40–45 dB (comparable to quiet speech). If the noise becomes stronger, new shades appear (grinding, vibration, metallic knocking) - this is a reason to check the refrigerator.

2. TOP 5 reasons for a loud hum or vibration

If the refrigerator begins to hum loudly, vibrate or “rattle”, the problem most often lies in one of these nodes:

The most common reason is incorrect installation. If the refrigerator is not level, the compressor vibrates more and the plastic parts rattle. It's easy to check: touch the body with your hand. If you feel strong vibration, there is a problem with the installation.

Adjust the front legs (should be 1-2 cm higher than the back ones)

Check whether the refrigerator is touching the furniture or walls

Make sure the floor is level (use a level)

Try to place rubber pads under the legs-->

⚠️ Attention: If a refrigerator Samsung or Bosch with an inverter compressor suddenly starts working loudly, this may be a firmware failure. Try unplugging it for 10 minutes, then plugging it back in. In 30% of cases this helps.

3. Cracking, clicking and grinding: what do these sounds mean

Sharp sounds - crackling, clicking or grinding - usually frighten users the most. But not all of them are dangerous:

• 🔥 Relay clicks - normal sound when the compressor is turned on/off. If the clicks are frequent (once every 1-2 seconds), and the motor does not start, the relay clicks are faulty start-up protection relay.
• ❄️ Ice cracking - in the freezer during automatic defrosting (No Frost). The sound may be loud, but this is not a breakdown.
• 🛠️ Fan grinding is a sign of bearing wear or ice getting on the blades. Requires urgent cleaning or replacement.
• 🔧 Metal knocking - may indicate loose compressor fastenings or tubes. Danger: vibration may damage the freon circuit.

If a grinding or knocking sound occurs when the door is opened, check hinges and seal. They may have become loose or dirty. In models Liebherr i Beko there is often a problem with the ice maker: ice can get stuck in the mechanism and make a cracking sound.

What to do if the refrigerator cracks when turned on?

If a cracking noise is heard in the first 5–10 seconds after switching on, this is the normal sound of plastic expanding during cooling. But if the cracking noise repeats every 1-2 minutes, check:

1. Are the compressor tubes touching the housing (can be gently bent by hand).

2. Is there ice on the fan (No Frost).

3. The integrity of the door seal - cracks can make a sound when the temperature changes.

4. The refrigerator began to make noise after defrosting or moving

If the noise appeared after defrosting, moving or a long shutdown, the reasons are usually temporary:

• 🚛 Transportation —the compressor may have moved, the fastenings have become loose. You need to let the refrigerator stand for 4–6 hours before turning it on.
• ❄️ Incorrect defrosting —if the ice was removed with a knife or hard objects, the tubes or fan could be damaged.
• 🔌 Power surge —after a power outage, the compressor may operate louder than usual for the first 1–2 hours.
• 🧊 Ice freezing —in models with No Frost after defrosting, ice may form on the fan.

If the refrigerator Indesit, Ariston or Atlant began to make noise after moving, check:

1. Are the tubes on the back wall bent?
2. Are the compressor fastenings loose (you can tighten the bolts with a 10mm wrench).
3. Has the shipping bolt gotten stuck (if you forgot to unscrew it).

5. Why is the new refrigerator louder than the old one? Many users wonder why a modern refrigerator is louder than the old one. Soviet

Many users wonder why a modern refrigerator Samsung RL60 or LG DoorCooling+ works louder than the Soviet one ZIL? The reasons lie in new technologies:

• 🌀 No Frost system —fans create additional noise (25–35 dB).
• 🔄 Inverter compressors —work continuously, but at different speeds (it may seem like they are “howling”).
• 🧊 Additional functions —ice makers, water dispensers, lights can also make noise.
• 📊 Energy efficiency —new models are optimized for economy, so the compressor operates at the limit of its capabilities.

According to standards GOST 16317-87, the permissible noise level for refrigerators is up to 55 dB. But in reality, even 45 dB can seem loud. If the noise bothers you, check:

• Is the refrigerator standing close to the wall (a 5-10 cm gap is needed).
• Is the mode Super Freeze or Fast Cool (they enhance the work of the compressor).
• Do the internal shelves or containers touch the ventilation holes.

6. When to call a repairman: 4 critical signs

Some sounds cannot be ignored - they indicate serious malfunctions. Call a specialist if:

⚠️ Attention: If the refrigerator Bosch or Siemens with electronic control has stopped freezing and is making a loud hum - this may be a freon leak. Do not try to repair it yourself: the refrigerant is toxic, and refilling requires special equipment.

• 🔥 The compressor runs without stopping + does not cool - thermostat failure or freon leak.
• ⚡ Sparks or burning smell —short electrical short circuit.
• 💥 Loud bang when turned on - swelling of the starting capacitor.
• 🧊 Ice on the back wall + grinding noise - system breakdown No Frost.

The cost of repair depends on the problem:

Before the technician’s visit, take a photo or record a sound on video - this will help you quickly determine the cause. Also check the warranty card: if the refrigerator is less than 2-5 years old (depending on the brand), repairs may be free.

7. How to reduce the noise of a refrigerator with your own hands

If the noise is not critical, but it bothers you, try these methods:

Move the refrigerator 10–15 cm from the wall

Check and tighten the compressor fastenings

Clean the rear grille from dust vacuum cleaner

Replace the rubber gaskets under the legs

Install the refrigerator away from heat sources (batteries, stoves)-->

For models with No Frost effective manual defrosting (even if the manufacturer claims that it is not needed). Do this once every 6–12 months:

1. Unplug the refrigerator.
2. Take out all the food.
3. Leave the doors open for 10–12 hours (you can use a fan to acceleration).
4. Wipe the internal surfaces with a dry cloth.

If the noise comes from the fan, try lubricating its bearing with silicone grease (for example, WD-40 Specialist). But do not use regular machine oil - it can damage the plastic.

FAQ: Answers to frequently asked questions

❓ Is the refrigerator gurgling loudly - is this normal?

Yes, if the sound appears periodically and is not accompanied by other symptoms (does not cool, does not turn on). This is refrigerant circulation. In new models Haier or Hisense gurgling may be louder due to the use of more efficient but noisy compressors.

❓ Why does the refrigerator hum louder at night than during the day?

At night the apartment is quieter, so the noise seems louder. Also the reason may be:

• A drop in voltage in the network (at night many appliances are turned off, the voltage can jump).
• Change in the temperature in the room (if the heating is turned off, the compressor works more intensely).
• Turning on the mode Eco or Sleep Mode (in some models it is activated automatically).

❓ Is it possible to replace the fan in the refrigerator yourself No Frost?

Theoretically, yes, but experience is required. Basic steps:

1. Disconnect the refrigerator and defrost.
2. Remove the back panel in the freezer.
3. Disconnect the fan power connectors.
4. Unscrew the fasteners and replace the part with a similar one.

Difficulty: in models Samsung or LG the board may need to be re-flashed after replacement. If you are not sure, it is better to call a specialist.

❓ How much does it cost to replace a compressor in a refrigerator Atlant?

The cost depends on the model and region:

• Compressor for Atlant MXM-170 — ~4 000–6 000 ₽.
• Foreman's work - 2,000–4,000 ₽.
• Refilling with freon - 1,500–3,000 ₽.

Total: 7,500–13,000 ₽. For refrigerators older than 10 years, replacement may not be practical - it is cheaper to buy a new one.

❓ Why does the refrigerator Indesit click but does not turn on?

This is a typical sign of a malfunction start-protective relay or compressor. Test algorithm:

1. Listen to see if there is a buzz after the click. If not, the relay has burned out.
2. If there is a hum, but the engine does not start, the problem is in the compressor (possibly jammed).
3. Check the voltage in the outlet - it should be 220–230 V.

The relay costs ~800–1,500 rubles, replacing the compressor will cost 5,000–10,000 ₽.