Have you ever stopped in the middle of the night, listening to a suspicious hum from the kitchen? Or suddenly heard a crash inside the refrigerator and rushed to check if the freezer had burst? The sounds of household appliances are a topic that worries every second owner. According to surveys of service centers, 43% of calls regarding “breakdowns” of refrigerators are associated specifically with noise, which in fact turns out to be a variant of the norm.
But how to distinguish operating noise of the compressor from signal of imminent breakdown? Why can the new one No Frost be louder than the old Soviet unit? And what should you do if the refrigerator starts to vibrate like a washing machine in spin mode? In this article we will analyze all types of sounds - from a barely audible buzzing to a loud knocking - we will explain their causes and provide checklists for self-diagnosis. We’ll also tell you which models of refrigerators (for example LG InstaView or Samsung Bespoke) are initially designed with a reduced noise level and why this is not always good for durability.
What refrigerator sounds are considered normal
The first thing to remember: complete silence from the refrigerator is not normal. Even the most modern models with inverter compressors make sounds, they are just less noticeable against the background of household noise. Here's what you can hear in a working unit:
- 🔊 Low-frequency hum (20–50 dB) - compressor operation. New models have a smoother sound, older ones have a pulsation.
- 💨 Air noise (similar to a slight hiss) - circulation of refrigerant through the tubes or fan operation in the systems No Frost.
- 🍃 Clicks - activation thermostat or compressor relay (usually 1-2 times per hour).
- 🌊 Gurgling or gurgling - movement of freon along the circuit (especially noticeable when first turned on).
Interesting fact: refrigerators with linear compressors (for example, LG Door-in-Door) can make sounds reminiscent of singing - this is a feature of their design. And models with double-circuit cooling (as Bosch Serie 8) sometimes “talk” in two keys - this is normal if the sounds do not increase over time.
It is important to understand that noise level depends on the energy consumption class. Refrigerators of class A+++ are usually quieter than B or C, because their compressors operate in a gentle mode. But there are exceptions: some premium models (for example, Liebherr Premium) are specially designed with a “quiet” mode, which is activated at night.
Table: Noise standards for different types refrigerators
| Refrigerator type | Noise level (dB) | Sound character | Examples of models |
|---|---|---|---|
| Compressor (regular) | 38–45 | Even humming with periodic clicks | ATLANT XM 4021-000, Indesit DF 4180 W |
| Inverter | 32–40 | Quiet buzzing without sudden changes | Samsung RB30A3200SA, LG GA-B489 YDQZ |
| No Frost (with fan) | 40–48 | Humming + air noise (like in a computer) | Bosch KGN39VL35R, Electrolux ERN 1400 FO |
| Asorption (gas) | 25–30 | Almost silent, only a slight gurgling | Dometic RM 4205, Electrolux ENB 3940 |
| Vintage (Soviet) | 50–60 | Loud humming with vibration, relay clicks | ZIL-63, Minsk-15M |
Please note: noise standards in the refrigerator passport are indicated for an empty chamber. If you have loaded food, the sound level may increase by 2-5 dB due to the change in acoustics inside. The noise level also depends on room temperature: in summer the compressor works more intensely, and the sound becomes louder.
Alarming sounds: when noise signals a breakdown
If the refrigerator begins to make sounds that were not there before, or the noise has become sharp, irregular or excessively loud this is a cause for concern. Here are the most dangerous “symptoms”:
- 🚨 Loud knocking or rattling - often indicates loose compressor mounts or a foreign object getting into the fan (No Frost).
- 🔥 Whistling or high-pitched hissing - possible freon leak or capillary pipeline clogged.
- ⚡ Frequent clicks (every 1-2 minutes) - malfunction of the start relay or thermostat.
- 🌀 Strong vibration with movement on the floor - compressor imbalance or damage to the shock absorbers.
- 💧 Gurgling intermittently for more than 10 minutes - problems with refrigerant circulation (the oil line may have frozen).
Especially dangerous metal clanging - it may mean that the circuit tube has burst or the compressor fastening element has broken off. In this case, you need immediately disconnect the refrigerator from power. network to call a technician. Continuing to work may lead to complete failure of the compressor and leakage of freon, which makes repairs economically unfeasible (the cost exceeds 70% of the price of a new refrigerator).
What to do if the refrigerator starts to “shoot”?
Sharp pops or sounds similar to gunshots are usually associated with thermal expansion of plastic parts (for example, a door seal). This is not dangerous, but may indicate two problems:
1) Sudden changes in room temperature (for example, if the refrigerator is located next to the radiator).
2) Wear of the sealing rubber - it is time to replace it, otherwise the load on the compressor will increase.
Another alarming sign - a change in the tone of the noise. For example, if previously the refrigerator hummed at low frequencies, but now the sound has become high and squeaky, this may indicate:
- Increased load on the compressor (for example, due to
incorrect temperature in the chamberordirty capacitors). - Wear of fan bearings (No Frost).
- Electrical problems (loose contacts, overheating of the winding).
Why is the new refrigerator noisier than the old one
Many users are faced with a paradoxical situation: they bought a modern class refrigerator A+++, but it turned out to be louder than a 20-year-old one Atlanta. What's the matter?
The reasons lie in design features:
- Inverter compressors work almost continuously (unlike the old ones, which turned on for 10–15 minutes and were silent for an hour). Their noise is less intense, but constant.
- Systems No Frost require forced air circulation - hence additional noise from fans.
- Thin casing walls Modern models absorb vibration less well (in pursuit of compactness, manufacturers save on noise insulation).
- Electronic control can emit a high-frequency squeak (especially noticeable with Samsung and LG with displays).
In addition, new refrigerators are often equipped additional functionswhich increase noise:
- 🍧 Fast freezing - the compressor operates at maximum.
- 🧊 Automatic defrosting —the heater turns on, clicks are heard.
- 🌬️ Air ionization —the built-in generator works (sometimes with a bang).
Set by level (adjust legs)|Move 5–10 cm away from the walls|Check the fastening of the transport bolts|Remove products touching the back wall|Activate the night mode (if any)-->
If the noise still seems excessive, check operation mode. For example, in refrigerators Beko i Gorenje there is a function Super Coolthat forces the compressor to work at the limit - it must be turned off manually after use.
How to independently diagnose the cause of the noise
Before Instead of calling a specialist, try doing primary diagnosis. Here is a step-by-step algorithm:
- Localize the sound source:
- 🔍 If there is noise bottom the problem is in the compressor or capacitor.
- 🔝 If top —fan (No Frost) or defrost heater malfunction.
- 🚪 If with sides doors - wear of the seal or misalignment of the hinge.
- Check external factors:
- 📦 Is the refrigerator touching furniture or walls?
- 🌡️ Is the room temperature above 30°C?
- ⚡ Is the network voltage stable (check with other devices)?
- 🔄 Turn off the refrigerator for 10 minutes, then turn it on - has the noise changed?
- ❄️ Turn the thermostat to minimum cooling - has the sound become quieter?
- 🎛️ If there is a display, check the error codes (for example,
E1y Indesit - problem with the sensor).
For models with electronic control (for example, Samsung Family Hub) you can run self-test. The instructions are usually in the menu: go to Settings → Diagnostics → Compressor test (path may vary). If the test shows an error, write down its code and contact the service.
If the diagnostics did not help, pay attention to the time the noise appeared:
- 🌅 In the morning/evening —it is possible power surges in the network.
- 🌙 At night —check if the defrost function is turned on at this time.
- 🔥 After defrosting —ice could form on the evaporator.
Top 5 causes of refrigerator humming and how to eliminate them
Humming is the most common type of noise. Let's look at its main causes and solutions:
| Cause of humming | Additional symptoms | Solution |
|---|---|---|
| Compressor overload | The refrigerator does not turn off, it is weak freezing | Adjust the temperature, check the seal, defrost |
| Dirty condenser | Humming with vibration, back wall is hot | Clean the grill with a vacuum cleaner or brush |
| Malfunction of the start relay | Frequent clicks, the compressor does not start | Replace the relay (the part costs ~1500–3000 rubles) |
| Wear of the suspension compressor | Strong vibration, knocking when starting | Tighten the fastenings or replace the shock absorbers |
| Low voltage in the network | Irrhythmic humming, flashing light | Connect via a voltage stabilizer |
Deserves special attention humming with a metallic tint. It may indicate:
- Friction of the circuit tubes about the body (you need to bend them or lay foam rubber).
- Moisture on electrical contacts (drying required).
- Initial stage of compressor jamming (urgent diagnostics needed).
Noise in No Frost refrigerators: what is normal and what is not
Systems No Frost (or Frost Free) by definition make louder noise due to the fans. But how to distinguish operating sounds from a breakdown?
Normal sounds for No Frost:
- 💨 Air noise (as in a computer) are the operation of the fan.
- 🔥 Crackling - heating of the defrost heating element (1-2 times a day).
- 🌬️ Clicks —air duct dampers are activated.
Signs of malfunction:
- 🚨 The fan runs without stopping —defrost sensor or timer is broken.
- ❄️ Ice on the back wall + loud noise - the drainage or evaporator is clogged.
- 🔊 Whistling or howling —the fan bearing requires lubricants.
In refrigerators No Frost pay special attention the drainage system. If it is clogged, the water does not drain, ice forms, and the fan begins scraping on the ice. To clean the drainage:
- Turn off the refrigerator.
- Remove the back panel in the freezer (usually secured with latches).
- Rinse the drainage hole with warm water and citric acid (1 tablespoon per glass).
- Check whether water flows freely into the pan (under the refrigerator).
Why can the fan in No Frost run constantly?
This happens if:
1) There is high humidity in the chamber (for example, hot dishes are placed).
2) The temperature sensor is faulty (shows false heat).
3) The evaporator is dirty (the fan is trying to blow out the ice).
In the first two cases, defrosting will help, in the third - cleaning or replacing the sensor.
For models s double No Frost (separately for the refrigeration and freezer chambers, like Samsung RB37J5230SA) is characteristic "echo effect" - the sound is reflected between the chambers and seems louder. This is not a breakdown, but if the noise is annoying, you can install the refrigerator in a niche or cover the internal walls with soundproofing film.
When the vibration of the refrigerator becomes dangerous
Mild Vibration when starting the compressor is normal. But if the refrigerator shakes, moves on the floor or rattles, it’s time to take action.
The main causes of vibration:
- 🔧 Uneven floor —the refrigerator sways, vibrations increase.
- 🛠️ Loose compressor fastenings —you need to tighten the bolts.
- 🌀 Fan imbalance (No Frost)—the blades are dirty or deformed.
- 🚫 Contact with furniture/walls —vibration increases resonance.
To eliminate vibration:
- Check level installations —the refrigerator must be level (use a building level).
- Adjust front legs —they should be 1-2 mm higher than the rear ones for a slight tilt back.
- Make sure that the compressor does not touch the tubes (relevant for old models).
- Put under the feet rubber gaskets (sold in furniture fittings stores).
Danger signal - vibration with a metallic clanging. This may mean:
- Friction of the circuit tubes against the body (you need to insulate them with foam rubber).
- Weakening of the compressor springs (replacement required).
- Ingress of a foreign object into fan (No Frost).
In refrigerators with linear compressors (for example, LG GA-B429 SLGL) vibration may be a consequence improper transportation. If the unit was transported lying down, oil from the compressor could get into the circuit - this can only be treated by professional vacuumization of the system.
FAQ: Answers to frequently asked questions about refrigerator noise
🔊 Why did the refrigerator become louder after moving?
Probable reasons:
- During transportation, the compressor fastenings were loosened (the bolts need to be tightened).
- The circuit tubes are wrinkled (check if they are touching the body).
- The refrigerator is on an uneven floor (adjust the legs).
- Into the system air has entered (vacuuming is required at the service).
If the noise does not go away after 2-3 days, call a technician to check the oil level in the compressor.
❄️ Is it normal for the refrigerator to crack during operation?
Yes, if there is a crack:
- Sharp and short (1-2 clicks) - the thermostat or relay is activated.
- Similar to the cracking of ice - this is the plastic of the case reacting to temperature changes.
- Audible when first turned on - the refrigerant begins to circulate through the pipes.
You need to contact the service if the cracking sound is:
- Constant and rhythmic (may be a fan malfunction).
- Accompanied by sparking or a burning smell.
- Similar to metal hitting metal (the tube may have burst).
🌙 Why does the refrigerator make noise at night, but not during the day?
Causes of night noise:
- Reducing the room temperature - the compressor turns on more often to maintain the mode.
- Activation of the defrost function (in No Frost) - usually programmed for night time.
- Surges voltage in the network (at night the load on the network is lower, but the voltage can “jump”).
- High humidity —condensation on the tubes amplifies sounds.
Solutions:
- Install voltage stabilizer.
- Activate night mode (if it is in the settings).
- Check whether the refrigerator is touching the furniture - at night the vibration increases due to silence.
🔧 Is it possible to repair it yourself? noisy compressor?
Independent compressor repair not recommendedas:
- Special equipment required (vacuum pump, pressure gauges).
- Skills required working with refrigerants (freon is toxic).
- Errors during repairs can lead to complete failure of the compressor.
What you can do yourself:
- Check the compressor fastenings and tighten the bolts.
- Clean the capacitor from dust.
- Replace the starting relay (the part costs ~1000–2000 rubles, instructions are on YouTube).
If the problem is wear of the piston group or interturn short circuit, the compressor must be repaired replacement. In service it will cost 8,000–15,000 rubles (depending on the model).
🛒 How to choose a quiet refrigerator when buying?
Pay attention to:
- Noise level in the passport —optimally up to 40 dB.
- Compressor type:
- Inverter—quieter, but more expensive to repair.
- Linear - more durable, but can "sing".
- Presence of noise insulation (for example, Liebherr there are models with additional vibration isolation).
- User reviews - look for references to noise in real conditions (on forums, in Yandex.Market).
Top 5 quiet models of 2026:
- LG GA-B489 YDQZ (32 dB, inverter compressor).
- Samsung RB30A3200SA (35 dB, system Digital Inverter).
- Bosch KAN92VI30R (38 dB, VitaFresh with noise insulation).
- Liebherr CBPesf 4043 (36 dB, premium sound insulation).
- ATLANT XM 4625-101 (39 dB, the best budget option).
Remember: the quietest refrigerators are absorption ones (25–30 dB), but they are less economical and require a perfectly level installation.