Does the refrigerator make noise when it is turned off: normal or broken?

Have you noticed that your refrigerator starts to hum loudly, crackle or even “shoot” when the compressor turns off? Such noise can be frightening - especially if it has not happened before. But this is not always a sign of a serious breakdown. In most cases, sounds are associated with physical processes within the system, and not with equipment failure.

However, you should not ignore the problem either. Some noises signal problems that can lead to costly repairs over time. In this article we will analyze all possible reasons from harmless to critical, we will learn to distinguish normal from breakdown and tell you what to do in each case. And if you have already tried to solve the problem yourself, but without success, at the end of the article you will find a checklist for diagnostics before calling a technician.

First, let's determine which sounds when turning off the refrigerator are considered normal and which are not. This will help save time and nerves.

What sounds are normal when the refrigerator is turned off?

Any refrigerator is a complex system with moving parts, refrigerant and electronics. When the compressor is turned off, some processes are inevitably accompanied by noise. Here's what you can hear in a working device:

• 🔊 The click of the relay —a sharp but short sound (like a light switch). This triggers the start-up relay, cutting off power to the compressor. For models Indesit, Atlant i Samsung the click may be louder due to the design of the relay.
• 💨 Hissing or gurgling is the movement of freon through the tubes after the compressor stops. It is especially noticeable in refrigerators with a system No Frost (for example, LG GA-B489 or Bosch KGE39XW2AR).
• 🔄 Crackling of plastic - body parts are slightly deformed when the temperature changes. More often heard in new refrigerators during the first 1-2 weeks of operation.
• 🌀 Quiet hum of the fan —in models with No Frost the fan can spin by inertia for another 5-10 seconds after the compressor is turned off.

These sounds should not cause concern if they are:

• Short-term (last no longer than 10-15 seconds).
• Not accompanied by vibration or overheating of the case.
• Do not become louder over time.

But extraordinary knocking, grinding or prolonged humming (more than 20 seconds) after the compressor is turned off is a reason to checkEspecially if the refrigerator has started. suddenly make noise, although it previously worked quietly.

Top 5 causes of noise when the refrigerator turns off

If the sounds go beyond the “normal” range, it’s time to look for the cause. we have collected the most common problems - from simple to complex.

1. Incorrect installation of the refrigerator

Even a working refrigerator will make noise if it is not level or touches the walls/furniture. When the compressor is turned off, vibrations are transmitted to the housing, amplifying the sounds. Check:

• 📏 Floor level —the refrigerator must be positioned strictly vertically (deviation). no more than 1-2°). and shutdown occurs with a jerk.
• 🪑 Gaps - there should be at least 5 cm between the back wall and the wall, 2-3 cm on the sides.
• 🧲 Magnetic seals — if the door does not fit tightly, the compressor runs longer, and shutdown occurs with a jerk.

In models with inverter compressor (for example, Hitachi R-BG410PUC6 or Panasonic NR-BN30AW1) even minimal distortion can cause a hum when the motor stops.

2. Wear or breakdown of the compressor

The compressor is the “heart” of the refrigerator, and its malfunctions often appear precisely when it is turned off. Pay attention to the following symptoms:

• 🔧 Loud knocking - may indicate loosening of the motor mounts or wear of the piston group.
• ⚡ Delayed clicks - if the relay is triggered through 5-10 seconds after the compressor stops, the contacts may be burnt.
• 🌡️ Overheating of the housing - after shutdown, the back wall should cool down in 10-15 minutes. If it is hot longer, the compressor is working for wear.

In refrigerators older than 10 years (for example, Stinol 102 or Birusa 130), compressor wear is a common problem. Modern models (Liebherr CNesf 4865, Electrolux ERN 1400 FOW) last longer, but are also not immune to breakdowns.

How to check the compressor. without tools?

Disconnect the refrigerator from the power supply for 30 minutes, then turn it on again. If, when starting, the motor hums but does not start (there is no relay click), or a metallic clang is heard immediately after turning off, the compressor is faulty.

3. Problems with the start-up relay

The relay is responsible for starting and stopping the compressor. If it breaks down, the refrigerator may:

• 🔁 Turn on and off cyclically with loud clicks.
• 🔇 Do not turn off at alluntil it overheats.
• 💥 Spark when triggered (visible if you remove the back cover).

Most often, the relay fails due to:

• Power surges in the network.
• Overheating (if the refrigerator is located next to the stove or battery).
• Natural wear and tear (relay service life is 5–7 years).

In models Atlant MXM 2835-90 or Nord NRB 137W the relay is often attached directly to the compressor - it can be replaced independently (the cost of the part is from 500 ₽).

4. Clogged capillary tube

If the refrigerator makes noise when turned off and does not freeze well, the capillary tube may be clogged (through which freon enters the evaporator). Signs:

• ❄️ The condenser (grid at the back) remains cold even after long-term operation.
• 🕒 The compressor runs without stopping for 20+ minutes.
• 💦 Ice appears on the back wall inside the refrigerator.

Clogging occurs due to:

• Moisture entering the system (for example, when freon is charged incorrectly).
• Oil decomposition in the compressor (relevant for older models).
• Corrosion of tubes (in refrigerators older than 15 years).

This problem cannot be fixed on your own - you need to flush the system and replace the freon. Service centers provide a 1-2 year guarantee for such work.

5. Malfunction of the fan (in models with No Frost)

In refrigerators with the system No Frost (Samsung RB-30 J3200SA, LG GA-B429 SQGL) the fan is blowing. evaporator for uniform cooling. If it makes noise when the compressor stops, the following are possible:

• 🍃 Ice crust on the blades —occurs when the defrost heater is faulty.
• 🔗 Ingress of foreign objects object (for example, a piece of cling film).
• 🔄 Bearing wear —the fan begins to “creak” even when the compressor is turned off.

To check the fan, turn off the refrigerator and try to turn the blades by hand. If they rotate slowly or jam, replacement is required.

How to diagnose the problem yourself: step-by-step instructions

Before calling a technician, go through this checklist. It will help narrow down the range of possible causes.

Check that the installation is level (use a level)|Inspect the back wall for overheating or icing|Listen for a clicking sound immediately after the compressor stops or after a few seconds?|Turn off the refrigerator for 30 minutes - does the noise continue?|Check that the refrigerator is not touching furniture or walls-->

If at any stage you find a problem, see the table below you will find recommendations for elimination.

If after checking the cause remains unclear, pay attention to additional symptoms:

• 📉 Temperature in the chambers if the refrigerator is bad freezes, the problem is most likely in the compressor or freon.
• ⏱️ Duration of operation of the compressor - if it turns on more often than once every 1-2 hours, a refrigerant leak is possible.
• 💡 Indicators on the panel - in modern models (Bosch KIN86AF30R, Samsung RB-37 J5200SA), errors are displayed on the display.

When to call a technician: 3 critical signs

Some problems require professional intervention. Contact the service center if:

⚠️ Attention: If the refrigerator begins to make noise when turned off and ice forms on the back wall inside the chamber - this is a sign of a breakdown of the defrosting system. Self-repair may lead to failure of the electronic unit. No Frost It began to make noise when turned off and at the same time ice formed on the back wall inside the chamber - this is a sign of a breakdown of the defrost system. Self-repair may lead to failure of the electronic unit.

1. The compressor does not turn off at all. or works intermittently (turns on for 5-10 seconds and turns off). This may indicate:

   • Freon leak.
   • Thermostat breakdown.
   • Short circuit in the compressor winding.

A burning smell has appeared or smoke coming from under the back cover. This is a sign of a short circuit - immediately unplug the refrigerator!

The display shows an error (for example, E1, F5 or H1 in models Indesit i Ariston). The decoding of the code can be found in the instructions or on the manufacturer’s website.

The cost of diagnostics in service centers is from 1000 ₽. If the refrigerator is under warranty, do not try to repair it yourself: this may result in denial of free service.

⚠️ Attention: In electronically controlled refrigerators (Liebherr, Siemens), attempting to replace a relay or compressor without special equipment may result in a firmware failure. In such cases, flashing of the unit is required, which increases the cost of repairs by 30–50%.

How to reduce the noise of a refrigerator: preventive measures

Even if your refrigerator is working properly, following simple rules will help prolong its life and reduce the noise level:

• 📍 Correct location - not Place the refrigerator near heat sources (stove, radiator, direct sunlight). The optimal room temperature is 18–22°C.
• 🔌 Stable voltage —use a surge protector or stabilizer (especially important for dachas and old houses). Voltage surges reduce the service life of the compressor by 20–30%.
• 🧊 Regular defrosting - even in models with No Frost once a year, turn off the refrigerator for 24 hours for complete defrosting.
• 🔧 Cleaning the condenser —dust on the rear grill impairs heat transfer, causing the compressor to work longer. Clean it with a soft brush every 6 months.
• 📦 Correct loading —do not place heavy foods (for example, jars of pickles) on the top shelves - this increases vibration when the compressor stops.

For refrigerators with inverter compressor (Panasonic NR-BN30AW1, Hitachi R-BG410PUC6) it is especially important to avoid overcurrent. Connect them to a separate outlet without using extension cords.

Review of models: which refrigerators make less noise than others?

If you are just planning a purchase and want to avoid problems with noise, pay attention to models with:

• 🔇 Inverter compressor —it works smoother, without sudden stops. Examples: Samsung RB-30 J3200SA, LG GA-B429 SQGL.
• 🏆 Low noise level (up to 38 dB). Leaders: Liebherr CNesf 4865 (37 dB), Bosch KIN86AF30R (38 dB).
• 🛡️ Vibration protection —for example, system SilentSystem in refrigerators Electrolux.

The table below compares popular models in terms of noise level and reliability:

When choosing, also pay attention to reviews of a specific model — sometimes even quiet refrigerators have “batch” with defective compressors. Check this on the forums (for example, IRecommend or Review).

⚠️ Attention: The noise level indicated in the characteristics is measured in laboratory conditions. In reality, it may be 2-5 dB higher due to the characteristics of the room (for example, if the kitchen is small and the refrigerator is in the corner, the sound will resonate).

FAQ: Frequently asked questions about the noise of the refrigerator when turned off

🔊 Why did the new refrigerator begin to make noise when turned off a month after purchase?

First weeks of operation, the refrigerator “grinds in”: the oil in the compressor is distributed, the housing parts adapt to temperature changes. If the noise appears suddenly, check:

• Is the refrigerator moved (perhaps the legs have sagged).
• Are the shelves (especially the top ones) overloaded?
• Is the super-freeze mode activated (in some models, the fan works more intensely).

If the sounds do not disappear after 1-2 weeks, contact the store for warranty.

⚡ Could the noise when turned off be associated with power surges?

Yes. At low voltage (less than 200 V), the compressor wears out, and when the relay turns off, may click louder than usual. Install a voltage stabilizer (for example, Resanta ASN-1000 N/1-C or Shtil R 600L).

Also check the socket: if it is loose, the contact may disappear when the compressor is turned off, which causes a crash.

❄️ Why does a refrigerator with No Frost make more noise when turned off than a regular one?

In models with No Frost the noise is added by the fan, which continues to rotate by inertia after the compressor stops. In addition, the defrosting system can make noise. gurgling sounds due to the movement of melt water. This is normal if:

• The noise lasts no longer than 20 seconds.
• There is no ice on the back wall of the refrigerator.
• The temperature in the chambers corresponds to the set temperature.

🛠️ Is it possible to replace the start-up protection relay yourself?

Yes, if you have basic electrical skills. Algorithm:

1. Disconnect the refrigerator from the network.
2. Remove the back cover (usually it is attached to latches or screws).
3. Find the relay - it is attached to the compressor (black or gray plastic box).
4. Disconnect the wires (take a photo of their location!) and replace the relay with a new one.

For models Atlant, Indesit and Birusa a universal relay is suitable Danfoss 103N0240 or Thermik TXP1EFor Samsung and LG it is better to take original parts.

💰 How much does it cost to repair if the refrigerator is noisy due to the compressor?

The cost depends on the model and type of compressor:

• Regular compressor (for example, in Atlant MHM 1843): 4000–6000 ₽ with work.
• Inverter compressor (for example, in Samsung RB-37 J5200SA): 8000–12000 ₽.
• Refilling freon (if there is a leak): 2500–4000 ₽.

If the refrigerator is more than 10 years old, sometimes it is more profitable to buy a new one. For example, repairing a compressor in Stinol 102 can cost 70% of the cost of a similar new model.