A new refrigerator is humming: how long is this normal and when is it time to worry?

You just bought a new refrigerator, turned it on - and heard a hum. The sound either increases or decreases, sometimes accompanied by clicking or gurgling sounds. A reasonable question arises: How long should a new refrigerator hum?and isn’t this a sign of marriage? In this article, we will figure out what noises are considered normal for modern models, and when it is worth contacting a service center.

Modern refrigerators are equipped with compressors, fans and refrigerant circulation systems that inevitably create noise. However, the line between "working noise" and "breakdown" is often blurred. We will analyze noise standards for different types of refrigerators (inverter, linear, with a system No Frost), tell you how to measure the decibel level yourself, and give a checklist for checking a new device.

It is important to consider that even refrigerators of the same brand have a level noise may vary depending on the model, chamber load and room temperature. For example, Samsung RB37A5200 in intensive cooling mode it will buzz louder than LG GA-B459SLGL in economy mode. But how to distinguish a “normal” hum from a malfunction? More on this further.

Noise standards for new refrigerators: what GOST and manufacturers say

According to GOST 16317-87, the permissible noise level for household refrigerators should not exceed 55 dB (decibel) in the daytime and 45 dB —at night. However, most modern models operate in a range 35–45 dB, which is comparable to a quiet conversation or computer noise. Manufacturers usually indicate this parameter in the technical specifications - look for it in the "Noise level" or "Noise level" section.

It is important to understand that real noise may differ from what is stated. For example: real noise data-i="70">(y

• 🔹 Inverter compressors (y Samsung, LG, Bosch) operate almost silently - 32–38 dB, but upon startup they can emit a short hum of up to 45 dB.
• 🔹 Linear compressors (y Indesit, Atlant) are noisier - 40–48 dB, but cheaper to repair.
• 🔹 Models with No Frost add 2–5 dB due to operation fan.
• 🔹 Built-in refrigerators (for example, Liebherr) are often quieter than freestanding ones - up to 30 dB.

If the passport says “38 dB”, and the device hums like a vacuum cleaner (60+ dB), this is a cause for concern. But before you call the service, check the operating conditions - perhaps the refrigerator is uneven, touching the wall or working in mode Super Freeze.

Why the new refrigerator hums louder than the old one: 5 reasons

Many users are surprised that the new refrigerator is noisier than the old Soviet one "ZIL" or "Minsk". It's not a matter of marriage, but of the design features of modern models. Here are the main reasons:

1. Intensive cooling in the first day. The new refrigerator operates at maximum power to reach the set temperature. The hum may last from 12 to 24 hours this is normal.
2. Automatic defrosting. Models with No Frost periodically turn on the fan to remove frost - this accompanied by gurgling and a short-term increase in noise.
3. Inverter compressor. It regulates power smoothly, but when switching modes it can make clicks or hums (especially for Samsung and LG).
4. Thin walls of the case. Modern refrigerators are lighter than Soviet ones, so vibration from the compressor is transmitted more strongly.
5. Electronic control. Sensors, displays and power supplies can create additional background noise (for example, high-frequency squeaking for some Bosch).

If the hum does not subside after 2-3 days, check:

Make sure that the refrigerator is level (adjust the legs)|Check that the back wall is not touching the furniture or the wall|Turn off the fast freeze mode (Super Cool)|Measure the noise level with the application (for example, Decibel X|Listen for any extraneous sounds (grinding, knocking, squealing)-->

⚠️ Attention: If the refrigerator makes metallic grinding or sharp knocks, immediately unplug it. This may indicate a compressor failure or a leak! refrigerant.

How to measure the noise of a refrigerator: step-by-step instructions

To objectively assess how loud your refrigerator is. refrigerator, use a smartphone and a free sound meter application (for example, Decibel X for iOS/Android or Sound Meter). Follow the algorithm:

1. Install the refrigerator on a flat surface, move it 10-15 cm away from the walls.
2. Close all doors, make sure that there are no products in the chambers that block ventilation.
3. Launch the application and bring the phone at a distance 1 meter from the refrigerator (at the compressor level).
4. Measure the noise in three modes:
   • 📏 Normal mode (temperature in the refrigerator compartment +5°C).
   • ❄️ Frozen mode (activate Super Freeze).
   • 🌙 Night mode (if there is a function Night Mode).

Compare the results with the standards from the table below.

If your measurements exceed the "maximum permissible" threshold, check:

• 🔌 Network voltage. At low voltage (less than 200 V), the compressor wears out and makes more noise.
• 🌡️ Room temperature. If the room is hotter than +30°C, the refrigerator will hum louder.
• 📦 Loading of the chambers. Crowded shelves impair air circulation, causing the fan to work more intensely.

When the hum of a new refrigerator is a malfunction: 7 warning signs

Not every noise is a reason to panic, but some sounds clearly indicate a breakdown. Contact the service center if:

1. The refrigerator hums continuously for more than 24 hours. without. pauses. The normal operating cycle of the compressor is 10–20 minutes of operation, 5–10 minutes of rest.
2. A metallic grinding sound appears. or knocking. This may be a breakdown of the compressor bearing or a foreign object getting into the fan.
3. A whistle or hissing is heard. Probably refrigerant leak (freon) - urgent repairs are required.
4. Vibration is transmitted to the floor and furniture. The fastenings may have become loose compressor or the shock-absorbing system is damaged.
5. The hum is accompanied by heating of the housing. If the side walls are hot, this is a sign of compressor overload.
6. The refrigerator does not cool, but hums. Thermostat malfunction or clogged capillary tube.
7. Foreign odors (burning, plastic). May indicate overheating of the electric motor or melting of the insulation.

⚠️ Attention: If the refrigerator is under warranty, do not disassemble it yourself! This will void the warranty. Contact the brand's authorized service center (contacts are in the warranty card).

What to do if the service refuses to recognize the defect?

If the examination showed that the noise is within normal limits, but you are not satisfied, request a re-inspection with the participation of a representative of Rospotrebnadzor. According to the Law “On the Protection of Consumer Rights” (Article 18), you have the right to demand a replacement of a product if its properties do not correspond to those declared. Save a video recording of the operation of the refrigerator with noise measurements - this will be proof.

Comparison of the noise of refrigerators of different brands: who is quieter?

The noise level depends not only on the type of compressor, but also on build qualitythe materials used and noise reduction technologies. We analyzed data from independent tests (including Roskachestvo and Which?) and compiled a rating of brands based on quietness of operation:

1. Liebherr (Germany). Leader in noiselessness - models of the series Premium give everything 30–32 dB thanks to double insulation of the housing and inverter compressors.
2. Bosch (Germany). Series KIN86 and KIN87 equipped with a system EcoSilencethat reduces vibration. Noise - 34–38 dB.
3. LG (Korea). Technology Linear Inverter Compressor ensures smooth operation, but some models (for example, GA-B459) may “howl” when switching modes.
4. Samsung (Korea). The RB i RT series have good performance (35–40 dB), but users complain about periodic relay clicks.
5. Atlant (Belarus). Budget models with linear compressors are noisy at 40–45 dB, but are reliable.
6. Indesit (Italy). The “loudest” in the rating are 45–50 dB, especially models c No Frost.

If silence is critical for you (for example, the refrigerator is in the studio or next to the bedroom), choose models with the mark Silent, Quiet or Low Noise in the name. Also pay attention to energy consumption class —the higher it is (A+++), the quieter and more economical the equipment operates.

What to do if the new refrigerator is humming too loudly: step-by-step plan

You measured the noise, compared it with the standards and realized that something is wrong. Follow the algorithm:

1. Check the installation.
   • 📏 The refrigerator must be level (use a level).
   • 🚫 Do not touch walls, furniture, heating pipes.
   • 🔌 Connected to an outlet with grounding (without extension cords!).
2. Set the modes.
   • ❄️ Disable Super Cool/Super Freeze.
   • 🌙 Activate the night mode (if available).
   • 🌡️ Set the temperature to +4°C in the fridge compartment, −18°C in the freezer.
3. Check the ventilation.
   • 📦 Do not fill the shelves with food (especially at the back wall).
   • 🍃 Clean the condenser grille (dust increases noise).
4. Contact the seller.
   • 📞 Report the problem within 14 days from the date of purchase - during this period you can return the product without examination.
   • 📝 Provide a video with noise measurement and check.

If the refrigerator is humming due to compressor defect or freon leak, repairs under warranty will take from 7 to 30 days. In this case, you have the right to demand a replacement during repairs (Article 20 of the Law “On Protection of Consumer Rights”).

FAQ: Frequently asked questions about the noise of new refrigerators

❓ How long should a new refrigerator hum when turned on for the first time?

At first 12–24 hours the refrigerator works in increased mode to cool the chambers. The hum can be continuous, but should subside after reaching the set temperature. If the noise has not decreased after a day, check the settings or contact the service.

❓ Why does the refrigerator hum louder at night than 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 seems louder.
2. Operating mode. Some models (for example, Bosch KIN86) activate night mode with reduced power, but longer compressor operating time.

Solution: move the refrigerator away from the bedroom or use earplugs.

❓ Can the refrigerator hum due to a poor-quality outlet?

Yes! If the socket is loose or the mains voltage is unstable (less than 200 V or more than 240 V), the compressor is overloaded, which increases noise. Check:

• 🔌 Contact density of the plug in the socket.
• 📊 Voltage with a tester (should be 220–230 V).
• 🚫 Lack of extension cords and tees.

If necessary install a voltage stabilizer.

❓ How to distinguish a “normal” hum from a breakdown?

Normal noise:

• 🔹 A smooth hum with periodic pauses.
• 🔹 Short clicks when turning on/off the compressor.
• 🔹 Gurgling or air flows (for models with No Frost).

Signs of breakdown:

• 🚨 Metallic grinding or knocking.
• 🚨 Continuous operation compressor for more than a day.
• 🚨 A sharp increase in noise after 1-2 weeks of operation.

❓ Does the temperature in the room affect the noise of the refrigerator?

Absolutely! At temperatures above +30°C, the compressor operates at maximum power, which increases the noise by 5-10 dB. Optimal conditions:

• 🌡️ +18–25°C indoors.
• 🚫 No direct sunlight on the body.
• 🚫 The refrigerator is not located next to the stove or radiator.

If in the room It's hot, use an air conditioner or a fan to cool the back wall of the refrigerator.