Why does a Samsung refrigerator make a cracking noise: is it normal or broken?

A refrigerator Samsung is a complex technical device that combines a compressor, a refrigerant circulation system, fans and electronic boards. Extraneous sounds, especially crackling, often cause concern among owners. But not every click or crackle indicates a malfunction: some noises are part of the normal operating process.

In this article we will look at what sounds are considered acceptable for refrigerators Samsung (including models No Frost, Digital Inverter and lines RB, RT, RS), and when the crackling becomes a reason to call a technician. You will learn how to diagnose the problem yourself, which components to check first and when noise can be eliminated without repair.

It is important to distinguish single clicks (for example, when turning on the compressor) from cyclic crackling or metal knocking, which may indicate a breakdown. We will also look at how operating conditions affect the noise level - from improper installation to voltage drops in the network.

1. Normal sounds of a Samsung refrigerator

Refrigerators Samsung with technology No Frost and inverter compressors (Digital Inverter) work quieter than classic models, but still make characteristic sounds. The manufacturer states that the permissible noise level for most household refrigerators is up to 40-45 dB, which is comparable to a quiet conversation. However, some sounds may seem unusual, although in fact they are part of the normal process.

"Normal" noises include:

• 🔊 Relay clicks - the sound of the start relay operating when the compressor starts or stops. Usually single, clear. More often heard in models with linear compressors (for example, Samsung RT-32K5030SA).
• ❄️ Crackling of plastic —expansion or contraction of plastic parts when the temperature changes (especially in the first hours after switching on). The sound is similar to a slight crackling.
• 🌀 The murmur of the refrigerant — gurgling or pouring of liquid through the pipes of the cooling system. May be accompanied by a quiet hissing.
• 💨 Fan noise is a uniform hum in models with No Frost (for example, Samsung RB37J5240SAIf the blades touch ice or dust, the sound becomes loud). intermittent.

The instructions for refrigerators Samsung indicate that in the first 24–48 hours after connection the device may make more noise due to adaptation to temperature conditions. Also, increased sounds are possible when:

• 🌡️ A sharp change in the temperature in the room (for example, when you turn on the air conditioner nearby).
• 🔌 Power surges in the network (the compressor works with increased load).
• 📦 Moving the refrigerator (the refrigerant is redistributed according to the system).

⚠️ Attention: If a cracking noise is accompanied vibration of the case, a burning smell or the refrigerator turning off 5-10 seconds after. startup, this is a sign of a malfunction. Immediately disconnect the device from the network and do not turn it on until diagnostics.

2. Top 5 causes of cracking noise that require attention

If the refrigerator Samsung cracks loudly, cyclically or with a metallic tint, this may indicate a breakdown. Below are the most common reasons, ranked by the frequency of calls to service centers (data for 2023–2026). gg.).

Please note: in refrigerators Samsung with a system Twin Cooling Plus (two independent cooling circuits) a cracking noise may occur coming from one compartment (for example, the freezer), while the other is working normally. This narrows down the search for the problem.

If you are not sure of the cause, perform a quick diagnosis:

Unplug the refrigerator for 1 minute, then turn it back on - does the sound repeat?

Check that does the back wall of the furniture/wall touch (there should be a gap of 5-10 cm)

Open the door - if the cracking stops, the problem is in the fan or seal

Shine a flashlight on the compressor - see if there are any traces of oil or rust-->

3. “good” crackling from “bad”

In order not to panic in vain, use this cheat sheet. It will help classify sounds according to their characteristics:

Normal sounds:

• ✅ Single clicks when turning on/off (relay).
• ✅ Quiet crackling in the first hours after defrosting (the plastic adapts).
• ✅ Rumbling or gurgling (freon circulation).
• ✅ Slight fan hum (for models No Frost).

Alarming sounds:

• ❌ Metal knocking —compressor pistons may be worn out or fastenings may be loose.
• ❌ Cyclic crackling (every 1–3 minutes)—malfunction of the thermostat or sensor.
• ❌ Crackling + vibration —compressor imbalance or pipes touching the housing.
• ❌ Clicks without starting the compressor —breakage of the start relay or winding breakage.

If the crackling sound is accompanied by at least one of these symptoms, specialist intervention is required:

• 🌡️ The temperature in the chambers does not correspond to the set temperature. (for example, in the freezer +5°C instead of -18°C).
• ⚡ The refrigerator turns off a few seconds after starting.
• 💧 Condensation or oil appears on the back wall or under the refrigerator.
• 🔥 The body heats up more than usual (especially in the area compressor).

⚠️ Attention: In refrigerators Samsung with the function SmartThings (smart control), some sounds may be associated with the operation of the electronic module. For example, clicks when switching modes through the application. Check the event log in the application - if the sound coincides with the command (for example, mode activation Power Cool), this is not a breakdown.

4. Self-diagnosis: step-by-step instructions

Before calling a technician, follow these steps. They will help narrow down the range of possible causes of the crackling sound and save on diagnostics.

Step 1. Localize the source of the sound

• 🔍 Place your ear on different parts of the refrigerator (not while the compressor is running!). Crackling noise from the front? The problem is in the fan or seal. Behind? Compressor or condenser.
• 🖐️ Gently move the refrigerator - if the sound changes, the tubes may be touching the cabinet or furniture.

Step 2. Check the operating conditions

• 📏 Make sure the refrigerator is level (use a level). An uneven surface increases vibration.
• 🔌 Connect the refrigerator to another power source (for example, through a surge protector) - power surges can cause relay clicks.
• 🧊 If the model is with No Frost, check if the drainage hole is clogged (a sign is water under the drawers for vegetables).

Step 3. Test mode

For refrigerators Samsung with a display:

1. Press and hold the buttons Power Cool + Fridge (or Freezer, depending on the model) for 5 seconds.
2. The refrigerator will go into test mode. Listen to the operation of the compressor and fan without normal load.
3. If the cracking noise persists, the problem is in the mechanical part. If it disappears, the operating conditions are to blame.

For models without a display:

1. Unplug the refrigerator for 10 minutes.
2. Turn on and immediately set the thermostat to maximum cooling.
3. Listen to how the compressor behaves in the first 30 seconds.

5. When to call a technician: criteria and cost of repair

If self-diagnosis does not produce results or reveals a serious malfunction, contact a service center. Here are the estimated prices for repairs (in Moscow and the regions for 2026):

When choosing a service center, pay attention to:

• 🛠️ Availability of original spare parts (ask for certificates for parts).
• 📄 Warranty on work (minimum 6 months).
• 🚚 Possibility of home visits (for refrigerators weighing >50 kg, delivery to the workshop is not practical).

⚠️ Attention: If your refrigerator Samsung is under warranty (usually 1-2 years), do not disassemble it yourself! This will void the warranty. Contact an authorized service center - the list is on the website Samsung Russia in the “Support” section.

Before the technician’s visit, prepare:

• 📄 Warranty card (if valid).
• 📱 Recording sound (will help more accurately diagnose the problem).
• 📋 List of symptoms (when the crackling appeared, how often it repeats, is it accompanied by other signs).

What to do if the refrigerator is under warranty, but the service center refuses to acknowledge the breakdown?

If an examination showed that the cracking sound was caused by “improper operation” (for example, lack of clearance for ventilation), but you are sure of the opposite, request a written refusal with justification. Then contact Rospotrebnadzor or the Samsung hotline (8-800-555-55-55). In 60% of cases, after re-inspection, the breakdown is recognized as covered by warranty.

6. Prevention: how to reduce the noise of a Samsung refrigerator

Many problems with noise can be prevented by following simple operating rules. Here is a checklist for refrigerator owners Samsung:

Install the refrigerator on a flat surface (use a level)

Ensure clearances: 5 cm at the back, 2–3 cm on the sides, 10 cm at the top

Defrost the refrigerator every 6–12 months (even if No Frost)

Check the door seal once every 3 months (clean and lubricate with glycerin)

Connect through a voltage stabilizer (especially in rural areas)-->

Additional tips:

• 🧲 Regularly clean the condenser (grid at the back) of dust - this reduces the load on the compressor.
• 🍎 Do not overload the doors with heavy products (for example, bottles). An imbalance leads to deformation of the seal and a cracking sound when opening.
• ❄️ In models with No Frost avoid opening the door for a long time - this leads to icing of the fan.
• 🔋 If there are frequent power surges in your area, use a voltage relay (for example, Zubr R116y).

For refrigerators with inverter compressor (Digital Inverter) it is especially important:

• 🔄 Do not turn on/off the refrigerator more than once a day - this reduces the life of the compressor.
• 🌡️ Set the temperature no lower than -20°C in the freezer and +2...+4°C in the main chamber (extreme modes increase noise).

If you buy a refrigerator Samsung "from hand", be sure to check:

• 🔊 Noise level during operation (turn on for 10-15 minutes in a quiet room).
• 📝 Availability of a service record (especially if the model is more than 5 years old).
• 🔋 Compressor condition - there should be no traces of oil or rust on the tubes.

7. Frequently asked questions about cracking in Samsung refrigerators

❓ The Samsung refrigerator only cracks at night. Why?

At night the room is quieter, so normal operating sounds (relay clicks, refrigerant circulation) become more noticeable. There are also two possible reasons:

1. The temperature in the room drops at night, and the compressor turns on less often, but with a greater load (hence the loud clicks).
2. If the refrigerator is located next to a heating radiator, during the day the heat masks the sounds, and at night they are heard more clearly.

What to do: Check the room temperature at night (optimally +18...+22°C) and make sure that the refrigerator does not touch the furniture/walls.

❓ After defrosting, the Samsung refrigerator began to crack more loudly. Is this normal?

Yes, for the first time 12–24 hours after defrosting, plastic parts may make cracking sounds due to temperature changes. Also possible:

• Murbling of refrigerant (it is redistributed throughout the system).
• Relay clicks (the compressor works harder to restore the temperature).

If the crackling does not disappear after a day or is accompanied by other symptoms (for example, insufficient cooling), check:

• Is there any ice left on the evaporator (in models No Frost).
• Is the door seal damaged during cleaning.

❓ Is it possible to replace the start relay in a Samsung refrigerator yourself?

Theoretically, yes, but only if you have experience working with electrical appliances. To replace you will need:

1. Disconnect the refrigerator from the network and discharge the capacitor (to avoid electric shock!).
2. Remove the back cover (in some models - the bottom panel).
3. Disconnect the relay contacts and install a new one (pay attention to the marking!).

Risks:

• ⚡ Electric shock (capacitors can retain charge!).
• 🔧 Damage to the compressor if connected incorrectly.
• 📄 Loss warranty (if it is still valid).

If you are not sure, it is better to call a specialist. The cost of the work (~1,000 ₽) is comparable to the risks.

❓ Why does the new Samsung refrigerator crack from the first day?

In new refrigerators, the cracking may be associated with:

• 🆕 Adaptation of materials —plastic and metal “get used” to operating temperatures.
• 📦 Transport fastenings —if the bolts or foam spacers are not removed (check the instructions!).
• ⚡ When starting the compressor for the first time —in new models with Digital Inverter louder clicks are possible at the start of operation.

What to do:

1. Let the refrigerator run 2-3 days —if the cracking does not intensify, this is normal.
2. Check that all transport fasteners have been removed (they can touch the tubes and cause rattling).
3. Check the “Normal sounds” section in the instructions for your model.

If the sound seems abnormal, record it and contact the store (under warranty) or service center.

❓ A cracking sound in a Samsung refrigerator is accompanied by blinking indicators. What is this?

Flashing indicators (for example, Alarm or Door Open) in combination with a crackling noise usually indicate:

Error code (blinking)	Possible cause	Actions
1 blink (every 5 sec)	Problem with temperature sensor	Check if food is blocking the vents
2 flashes	Fan malfunction	Defrost refrigerator for 12 hours
3 flashes	Problem with the compressor or relay	Turn off the refrigerator and call a technician
4 flashes	Electronic module failure	Try reset settings (turn off for 10 minutes)

The exact explanation of the error code for your model can be found in the instructions or on the website Samsung by model number (listed on the sticker inside the chamber).