Why is the Ariston refrigerator humming: normal or broken?

Have you noticed that the refrigerator Ariston has started to hum louder than usual? This sound can range from a barely noticeable buzzing sound to an obsessive roar that can be heard even in the next room. Before you panic and call a repairman, it is important to understand: not every noise indicates a breakdown. Modern models Ariston Hotpoint (for example, series HB 3800 or RST 100) are equipped with powerful compressors and ventilation systems, which by default operate with a certain noise level. But how to distinguish a “normal” hum from an alarm signal?

In this article we will analyze 7 main causes of hum in refrigerators Ariston —from a banal overload of products to serious malfunctions such as motor wear or freon leakage. You will learn how to diagnose the problem yourself, when you can get by with simple adjustments, and in which cases you cannot do without professional repairs. We will pay special attention to models with a No Frostsystem, which often make noise due to fans, and refrigerators with linear compressors (for example, Ariston MARVEL), where hum can be a sign of unstable voltage.

1. Natural sounds of a refrigerator

The first thing you need to understand: complete silence for a refrigerator is not normal. Even the most modern models Ariston make sounds during operation. This is what is considered a variant of the norm:

• 🔄 Cyclic activation of the compressor: the hum lasts 10–20 minutes, then subsides (the motor pumps in cold and turns off when the set temperature is reached).
• 💨 Fan noise in models c No Frost: slight buzzing or air currents (especially noticeable in Ariston BST 185 and the like).
• 💧 Gurgling or overflowing of liquid: this is freon circulating through the tubes (more often heard when first turned on or after defrosting).
• 🔊 Relay clicks: sharp short sounds when starting/stopping the compressor (do not confuse with the cracking of ice!).

If the hum is monotonous, it is not accompanied by vibration or overheating of the housing, and its level is not exceeds 40–45 dB (for comparison: this is like a quiet conversation), most likely there is nothing to worry about. But there is a nuance: in new refrigerators Ariston in the first months of operation, the noise may be slightly higher than usual - this is due to the running-in of parts. If after 2-3 weeks the hum has not decreased, you should look deeper for the cause.

⚠️ Attention: The noise level is indicated in the technical data sheet of the model (section “Characteristics”). For example, for Ariston HBM 1182 the norm is 39 dB, and for Ariston RST 100 up to 42 dB. Exceeding these values by 5–10 dB is a reason for diagnosis.

2. Overloading with products or improper placement

One ​​of the most common causes of increased hum is impaired air exchange inside the chamber. Refrigerators Ariston (especially with the system No Frost) are designed for uniform circulation of cold air. If the shelves are packed to capacity, or products are placed close to the back wall, this leads to:

• 📦 Increased load on the compressor: the motor works longer and louder, trying to cool the overloaded volume.
• ❄️ Evaporator freezing (in models without No Frost): ice on the back wall worsens heat transfer, the compressor hums louder.
• 🌀 Shelf vibrations: if cans or bottles touch the walls, they can resonate, increasing the noise.

How to check? Open the refrigerator and inspect:

1. The back wall - whether there is ice or frost on it (even a thin layer impairs heat transfer).
2. The distance between the food and the walls should be at least 2-3 cm.
3. Shelves - do not touch whether they are each other or the housing with the door closed.

The solution is simple: unload the refrigerator, redistribute the products and leave gaps for air circulation. If there is ice on the back wall, defrost the refrigerator for 10–12 hours. In 80% of cases, this is enough for the hum to decrease.

3. Incorrect installation of the refrigerator

The refrigerator Ariston may hum due to unstable position or close contact with other surfaces. Here are typical installation errors leading to noise:

• 🏗️ Uneven floor: if the refrigerator is tilted, the compressor vibrates more, and the shock absorbers do not dampen vibrations.
• 🔌 Touching walls or furniture: vibration is transmitted to adjacent surfaces, increasing the hum (especially important for built-in models).
• 📏 Lack of clearance at the back: if the refrigerator is pressed tightly against the wall, the ventilation of the condenser is disrupted and the motor overheats.

How eliminate:

1. Use building levelto level the refrigerator. Adjust the height of the legs (in models Ariston they usually have threads).
2. Provide clearances: 5 cm at the back (for ventilation), 2–3 cm on the sides and 10 cm at the top (if the model is not built-in).
3. Check whether the refrigerator is touching pipes or wires - they can transmit vibration.

If the hum remains after leveling, check compressor shock absorbers (rubber feet at the bottom rear). Over time, they harden or crack, no longer dampening vibration. In this case, they need to be replaced - the part is inexpensive (about 300–500 rubles) and is suitable for most models Ariston.

4. Problems with the compressor: from overheating to wear

The compressor is the “heart” of the refrigerator, and its malfunctions often manifest themselves through a hum. Let's consider 3 main scenarios:

The most dangerous situation is when the compressor buzzing, but not starting (relay clicks are heard, but the motor does not start working). This is a sign interturn short circuit or piston wedge. In this case, the compressor must be replaced, and repairs cannot be delayed: long-term operation in this mode can lead to fire due to overheating of the windings.

How to check the compressor yourself:

1. Disconnect the refrigerator from the network for 10 minutes, then turn it on again. If the hum repeats, the problem is serious.
2. Touch the compressor housing (it is located at the bottom back): if it is scalding hotit is a sign of overload.
3. Listen if there is metallic knock inside the motor - this may indicate destruction of the piston.

⚠️ Attention: If the refrigerator Ariston s inverter compressor (models Ariston MARVEL or Velis Evo), its hum may vary depending on the load - this is normal. But if the sound becomes intermittent or is accompanied by errors on the display (for example, E1 or E2), diagnostics of the control board is required.

5. Fan malfunctions in No Frost systems

Refrigerators Ariston with a system No Frost (for example, Ariston BST 185 or HB 3800) are equipped with a fan that distributes cold air throughout the chamber. If it starts to hum, this may be due to:

• 🍃 Dirty blades: dust, grease or ice on the fan creates an imbalance, causing it to vibrate and make noise.
• ❄️ Freezing of the evaporator: if ice blocks the blades, the fan runs under load, making a hum or grinding.
• 🔧 Bearing wear: over time, the lubricant dries out, and the fan begins to “howl” at high speeds.

How to diagnose:

1. Unplug the refrigerator and defrost it for 12–24 hours. If the hum disappears after turning on, the problem was ice.
2. Remove the back panel in the freezer (in most models Ariston it is secured with latches) and inspect the fan. Dust can be removed with a vacuum cleaner, ice can be carefully chipped off (do not use sharp objects!).
3. Rotate the blades manually: if they rotate with difficulty or make a squeak, the fan needs to be replaced.

If the fan does not spin at all, check fuse (it can burn out if overloaded) or defrost timer (in models with Full No Frost). These parts are inexpensive (from 500 rubles), but replacing them requires disassembling the refrigerator.

How to get to the fan in Ariston No Frost

In most models (for example, Ariston BST 185) you need:

1. Turn off the refrigerator and remove all shelves from the freezer.

2. Remove the back plastic panel (it is held on by clips - pry it off with a screwdriver).

3. The fan is located at the top, behind the evaporator. Be careful: do not damage the freon tubes!

6. Electrical problems: power surges and network faults

Refrigerators Ariston are sensitive to the quality of the power supply. If your network often occurs voltage surges or it is constant under/overstated, this can lead to:

• ⚡ Transformer hum (in models with electronic control): the sound is similar to low-frequency humming.
• 🔌 Unstable operation of the compressor: the motor either hums louder or almost goes silent (a sign of lack of power).
• 💥 Protection activation: the refrigerator may turn off with an error E4 or E5 (code depends on the model).

How to check:

1. Use multimeterto measure the voltage in the outlet. The norm is 220–230 V with a deviation of no more than ±10%.
2. Connect the refrigerator via voltage stabilizer (for example, Resanta ASN-1000). If the hum disappears, there is a problem in the network.
3. Check the outlet: it must be grounded and designed for a load of at least 10 A.

If the voltage is normal, but the hum remains, check surge filter the refrigerator (it is built into the plug or cord). In models Ariston older than 5 years, the filter may fail, causing interference. Replacing it will cost 800–1500 rubles.

⚠️ Attention: If the refrigerator Ariston is connected via an extension cord, this may be the cause of the hum! Extension cords with thin wires create additional resistance, causing the compressor to overload. Always use direct connection to the outlet.

7. When you can’t do without a technician: serious breakdowns

If you have tried all the methods, but the refrigerator Ariston continues to hum, most likely the problem is serious malfunction. Here are the signs for which you need to call a specialist:

• 🔥 The compressor heats up to a temperature above 90°C (can be checked with an infrared thermometer).
• ❄️ The refrigerator does not freeze, but the motor runs without stopping.
• 💣 A chemical smell has appeared (a sign of freon leakage or insulation burning).
• 🛠️ The display shows an error (for example, E1, E3, F05 —for decoding, see the instructions for the model).

The cost of repair depends on the breakdown:

If the refrigerator is under warranty do not disassemble it yourself this will void the warranty. Contact the service center Ariston (contacts are in the warranty card). For models older than 5 years, repairs may be unprofitable - in this case, the technician will advise you to consider buying a new refrigerator.

FAQ: Frequently asked questions about hum in Ariston refrigerators

❓ Why does the new Ariston refrigerator hum louder than the old one?

Modern models Ariston (for example, Velis Evo or Marvel) are equipped with more powerful compressors and ventilation systems, which may be noisier than older refrigerators with a drip system. In addition, in the first weeks of operation, the parts “grind in” and the noise may be slightly higher than usual. If after 2-3 weeks the noise has not decreased, check the installation and load on the compressor.

❓ Is it possible to replace the compressor in Ariston yourself?

Theoretically yes, but in practice it is risky. Replacing a compressor requires:

1. Special equipment (vacuum pump, pressure gauges).
2. Knowledge about refilling freon (its type and quantity depend on the model).
3. Ability to solder copper pipes (in case of refrigerant leakage).

An error during replacement can lead to repeated breakdown or freon leak, so it is better to entrust the work to a specialist.

❓ Why does the Ariston refrigerator hum at night, but is quiet during the day?

This is due to two factors:

1. Temperature in indoors: it is cooler at night, and the compressor turns on less often, but runs longer (which makes the hum more noticeable).
2. Quiet in the house: during the day, noise is masked by household sounds (TV, conversations), and at night it seems louder.

If the refrigerator does not show errors and freezes normally, there is nothing to worry about. For sensitive sleepers, you can move the refrigerator away from the bedroom or use noise-absorbing mat under the legs.

❓ What to do if the Ariston refrigerator is humming and does not turn off?

This is a sign that the compressor is working in continuous mode. The reasons may be different:

• 🔥 High room temperature (above 30°C).
• 🚪 Not tightly closed door (check the seal).
• ❄️ Freon leak or capillary tube clogged.
• 📉 Thermostat malfunction (does not turn off the compressor when the temperature is reached).

First defrost the refrigerator and check the door seal. If the problem remains, call a technician for diagnostics.

❓ How to reduce the hum of an Ariston refrigerator without repair?

If the noise is not associated with a breakdown, try these methods:

• 🔧 Level the refrigerator by level.
• 🧊 Thaw (if there is ice).
• 🔌 Connect through a stabilizer (if there are power surges in the network).
• 📦 Redistribute the products, leaving gaps for air circulation.
• 🎚️ Set the temperature 1-2° higher (for example, +5°C instead of +4°C) so that the compressor turns on less often.