The refrigerator is one of the most “talkative” household appliances in the house. Humming, clicking, gurgling and even squeaking noises can make you nervous, especially if you don't know which sounds are normal and which ones indicate a problem. In this article, we'll figure it out correctly: from diagnosing by ear to checking key components. how to determine the noise of a refrigerator correctly: from diagnostics “by hearing” to checking key components.
Modern models (Samsung No Frost, Liebherr BioFresh, Indesit classic series) are quieter than old Soviet units, but even they are not silent. The normal noise level for a refrigerator is 35–45 dB (like a quiet conversation or the rustling of leaves). If the sound becomes louder, changes in character, or appears at unusual times (for example, at night, when the compressor should be resting), this is a reason to listen more carefully.
It is important to understand: some noise is part of the normal operation of the equipment. For example, Clicks of the starter relay when the compressor is turned on is the norm, but a constant buzzing without pauses may indicate overheating or wear of parts.. Next, we’ll figure out how to distinguish one from the other.
What sounds does a working refrigerator make?
Even a new refrigerator does not work at all silently. Here typical soundsthat should not cause concern:
- 🔊 Low-frequency humming - the operation of the compressor (the heart of the refrigerator). Usually cyclical: it works for 10–20 minutes, then rests for 5–10 minutes.
- 💧 Gurgling or gurgling is the movement of refrigerant (freon) through the tubes. Particularly noticeable in models with No Frost.
- 🔄 Clicks - activation of the thermostat or start-up relay when the compressor is turned on/off.
- 🌬️ Fan noise - in refrigerators with the system No Frost (for example, Bosch KGE39XW2AR or LG GA-B489YGQZ). It sounds like a slight buzzing.
The intensity of the sounds depends on the model. For example, inverter compressors (Samsung RB30A3200SA, Hitachi R-BG410P6) operate almost silently, while conventional piston compressors can hum more noticeably. If your refrigerator has always sounded like this, and suddenly nothing has changed, most likely everything is fine.
Alarm signals: when is noise a sign of a breakdown?
If the refrigerator began to make noise different than usual, or the sounds became louder, this may indicate a malfunction. Pay attention to the following signs:
- 🚨 Continuous humming without pauses - the compressor runs non-stop, which leads to overheating. Possible reasons: freon leak, thermostat malfunction, capillary tube clogged.
- 🔧 Metal grinding or knocking - often indicates wear of the compressor bearings or loose fastenings.
- ⚡ Loud clicks with pauses —may be a problem with the start-up relay (especially in older models Atlant or Stinol).
- 🌪️ Strong vibrationwhich makes the shelves rattle - a sign of compressor imbalance or improper installation of the refrigerator.
It is especially dangerous if noise is accompanied lack of cold in the chambers or, conversely, excessive frost (for example, ice forms in the refrigerator compartment. In such cases, it is better not to diagnose). postpone.
⚠️ Attention: If the refrigerator emits hissing (like air from a cylinder) - this may be a freon leak. Immediately unplug the device and call a technician. a leak leads to system breakdown.
How to diagnose noise yourself?
Before calling a technician, try identify the source of the noise yourselfHere is a step-by-step procedure. instructions:
- Unplug the refrigerator for 1-2 hours, then turn it on again. If the noise disappears, the problem could be a temporary failure (for example, the fan is jammed due to ice).
- Listen to the localization of sound:
- Noise from below - compressor or condenser.
- Noise rear - fan or tubes with freon.
- Noise inside the chamber - system operation No Frost or freezing of the evaporator.
Turn off the refrigerator for 2 hours and turn it on again|
Check that the installation is even (use a level)|
Clean the back wall of dust|
Listen to the localization of the sound (from below/behind/inside)|
Check whether the tubes are touching each other or the housing-->
If after these steps the noise does not disappear, record its nature and frequency on a voice recorder - this will help the technician quickly identify the problem.
Noise in refrigerators of different systems: No Frost vs drip
Type of defrosting. greatly affects the “sound palette” of the refrigerator. Let's figure out what noises are typical for each system:
| System type | Characteristic sounds | Possible malfunctions |
|---|---|---|
| No Frost (automatic defrosting) |
|
|
| Drip (manual defrosting) |
|
|
| Inverter compressor | Almost silent operation, smooth change in hum tone. | Problems with the control board (uncharacteristic sounds, malfunctions). |
In refrigerators No Frost (for example, Samsung RB37J5230SS or Electrolux ENN2854AOW) fan noise is normal, but if it becomes louder, check if the evaporator is frozen. In drip models (Indesit DS 4180 W, ATLANT MXM 1705-80), pay attention to sounds associated with defrosting.
Why do No Frost refrigerators make more noise than drip refrigerators?
The No Frost system requires forced air circulation, for which a fan is used. In addition, such models have a defrosting heater that periodically turns on/off, creating additional sounds. Drip refrigerators are simpler in design, and therefore operate quieter.
Top 5 causes of increased noise and how to eliminate them
If diagnostics showed that the noise is abnormal, here are the most common causes and ways to eliminate them:
- Uneven installation or touching tubes
The refrigerator must be strictly level. If the floor is uneven, the compressor vibrates more. Solution: Adjust the feet or add anti-vibration pads. Check to see if the condenser tubes are touching the back wall or each other.
- Dirty condenser
Dust on the condenser grille (at the back of the refrigerator) impairs heat transfer, causing the compressor to work harder. Solution: Turn off the power and clean the grille with a brush or vacuum cleaner.
- Worn compressor bearings
If you hear a metallic grinding or knocking noise, the bearings may be worn out. Solution: the compressor needs to be replaced (it is not recommended on its own - you need special tools and refilling freon).
- Fan malfunction
In models No Frost the fan may make noise due to ice on the blades or motor failure. Solution: Defrost the refrigerator for 12 to 24 hours. If the noise remains, the fan needs to be replaced.
- Freon leak
Signs: the compressor works without stopping, but the cold is weak, a hissing is heard. Solution: just call a technician - you need to refill the refrigerant and solder the pipes.
⚠️ Attention: If the refrigerator over 10 years and the noise is accompanied by other problems (does not freeze, often turns off), it may be cheaper to buy a new one than to repair the old one. Modern models (for example, Liebherr CBPesf 4056) consume 2 times less electricity and are quieter.
When to call a technician: symptoms of serious breakdowns
Some faults require professional intervention. Contact the service center if:
- 🔥 The compressor hot to the touch and does not turn off for more than an hour.
- ❄️ In the refrigerator compartment ice is formed, although the system No Frost.
- 💥 You can hear pops or explosions (there may be a short circuit in the start-up relay).
- 📉 Refrigerator does not cool, but makes more noise than usual.
- 🔌 When plugged in the machine is triggered in the panel.
The cost of repairs depends on the breakdown. For example, replacing a compressor will cost 5-10 thousand rubles, and cleaning the system No Frost - 2-4 thousand rubles. In some cases (for example, if there is a freon leak), the technician may suggest charging with an alternative refrigerant (for example, R600a instead of R134a), which is cheaper, but less durable.
Prevention: how to reduce the noise of a refrigerator?
To make the refrigerator run quieter and longer, follow these tips:
- 🧹 Clean condenser every six months (dust increases the load on the compressor).
- 📏 Keep the gaps: there must be at least 5 cm between the refrigerator and the wall for air circulation.
- 🚪 Check the seals doors. If they are worn out, the compressor works harder, trying to maintain the temperature.
- ❄️ Defrost the refrigerator (even No Frost), if ice builds up on the back wall.
- 🔌 Use a surge protector —voltage surges can damage the control board, which leads to abnormal noise.
For models with No Frost it is useful to carry out once a year deep cleaning: turn off the power, remove all shelves, rinse the internal surfaces with warm water and soda (1 tablespoon per liter). This will prevent the fan from freezing and prolong the life of the equipment.
FAQ: Frequently asked questions about refrigerator noise
Why is a new refrigerator noisier than the old one?
Modern models are often equipped with additional systems (fans No Frost, inverter compressors, electronic boards), which can create more noise than simple drip refrigerators. However, the overall noise level usually remains within normal limits (up to 45 dB). If the sound seems too loud, check whether the refrigerator is touching walls or furniture - this increases the vibration.
The refrigerator began to make noise at night. Is this normal?
If the noise is not heard during the day, but appears at night, there are two possible reasons:
- At night, the house is quieter, and the usual sounds of the compressor become more noticeable.
- The thermostat operates more often due to changes in the temperature in the room (for example, if the kitchen is cooled).
Observe 2–3 nights. If the noise does not increase, there is no need to worry.
Is it possible to replace the compressor yourself if it is noisy?
Theoretically yes, but in practice it is difficult and dangerous. Replacing a compressor requires:
- Special equipment (vacuum pump, pressure gauges).
- Knowledge of the rules for charging freon (some refrigerants, for example
R600a, are flammable!). - Ability to solder copper tubes.
An error can lead to freon leakage or damage to the new part. It is better to entrust this to a specialist.
What to do if the refrigerator is noisy, but the warranty has expired?
First try to eliminate simple causes (cleaning, adjusting the legs). If it doesn't help:
- Contact an independent service center (the cost of repairs will be lower than at an official dealer).
- Check if the manufacturer has any promotions for repairs (for example, Samsung or LG sometimes they conduct free diagnostics).
- If the refrigerator is older than 7–10 years, evaluate the feasibility of repairs. It may be cheaper to buy a new class model
A+++(it will pay for itself due to energy savings).
How to measure the noise level of a refrigerator?
Use free smartphone applications (for example, Decibel X or Sound Meter). Algorithm:
- Install the phone at a distance of 1 meter from the refrigerator.
- Close all windows and doors to minimize extraneous sounds.
- Start the measurement for 5-10 minutes (including compressor work/rest cycles).
Normal level - up to 45 dB. If the device shows 50 dB or higher, this is a cause for concern.