The situation when the refrigerator makes noise The sound of a cricket often takes owners by surprise, disturbing the usual acoustic comfort in the apartment. Instead of the smooth hum of the motor or silence in standby mode, a high-frequency chattering sound begins to be heard, reminiscent of the work of an insect. This phenomenon is not the norm for working equipment, although it does not always indicate a fatal breakdown that requires immediate replacement of the unit.
Understanding the nature of this noise requires a detailed analysis of the operation of internal systems. Refrigeration circuit, the compressor, condensate drainage system and even the electronic control board can become the source of such a specific sound. It is important not to ignore the first signs, since a constant high-frequency sound may indicate an increased load on the components, which in the long term shortens the service life of the equipment.
In this article we will analyze in detail the mechanical and physical causes of “cricket”, consider methods of self-diagnosis and determine when a technician’s intervention is really necessary. Correct interpretation of sound signals will help you save time and money on repairs.
Mechanical causes: fan and icing
The most likely source of a sound reminiscent of a cricket or the cracking of a plastic ruler is the system No Frost. In refrigerators with this system, air circulation is provided by a fan. Over time, ice may accumulate on the blades or hub, which, when rotating, touches the housing or protective grille.
The fan rotation speed is high, and periodic impacts of the blades on the ice create a rhythmic crackling sound. This happens especially often if the door seal is broken and moist air enters the chamber. Moisture instantly freezes on cold elements, interfering with rotation.
It is also worth paying attention to the condition of the fan motor bearing. If the lubricant has dried out or dust has entered the mechanism, the shaft begins to rotate with difficulty, emitting a characteristic high-frequency whistle or chatter. In some models Indesit or Atlant this is a common problem after 5-7 years of operation.
To eliminate the problem, it is often necessary to completely defrost the unit within 24 hours. If, after switching on, the sound returns after a few days, it means that the defrost cycle is broken, and a check is required The defrost heating element or the sensor.
Operation of the compressor and start relay
The second most common cause is itself compressor. Modern motors are quite quiet, but internal mechanical components can wear out. The sound of a cricket in this case is often described as a metallic ringing or high-frequency vibration emanating from the lower part of the housing.
Particular attention should be paid to the starting relay. This small element is responsible for starting the engine. If the contacts inside the relay are burnt or the mechanism is stuck, a distinct crackling or clicking sound is heard when you try to start it. The compressor may try to start, make a “cricket” sound and immediately stall.
Vibration of pipelines can also create the illusion of chirping. If the copper tubes leading to the motor are located too close to each other or to the housing, resonance during operation of the piston group causes them to collide. This often occurs in models Beko and Liebherr after transportation.
☑️ Diagnostics of the compressor compartment
⚠️ Attention: If you hear a loud metallic clang or a “cricket” sound immediately when the compressor stops, this is may indicate destruction of the valve group. Operating such a refrigerator is dangerous - the motor can completely jam.
Boiling of the refrigerant and expansion of gases
Physical processes occurring inside the refrigeration circuit are also capable of generating sounds that the average person can compare to a chirping sound. When freon goes from liquid to gas in the evaporator, it may gurgle or hiss. Refrigerant, however, if the sound sounds more like a cricket, this may indicate unstable pressure in the system. This often happens when the freon charge is incomplete or there is an air lock. Gas passing through a narrow opening of a capillary tube at high speed creates a whistling-crackling effect. refrigerant (freon) changes from a liquid to a gaseous state in the evaporator, it may “gurgle” or “hiss.”
However, if the sound sounds more like a cricket, it may indicate unstable system pressure. This often happens when the freon charge is incomplete or there is an air lock. The gas, passing through the narrow opening of the capillary tube at high speed, creates a whistling-crackling effect.
In addition, thermal expansion of materials plays a role. The plastic of the inner chamber and metal evaporators compress and expand with a sharp change in temperature. In models with a plastic evaporator box (often Samsung or LG), the crackling of plastic in the cold can be very similar to the work of an insect.
| Sound type | Probable cause | Localization | Repair urgency |
|---|---|---|---|
| Rhythmic crackling | Fan icing | Freezer compartment | Medium (need defrosting) |
| Metallic ringing | Vibration of tubes or compressor | Back wall from below | Low (can be eliminated yourself) |
| High-frequency whistle | Freon leak or blockage | Throughout the entire system | High (requires a master) |
| Crackling sound when starting | Faulty start relay | Compressor compartment | High (risk of motor combustion) |
The influence of power supply quality on sound
Unstable voltage in the electrical network is the hidden enemy of household technology. If your network experiences frequent power surges or sags, the compressor may be operating abnormally. The electric motor tries to compensate for the lack of power, which causes humming and high-frequency vibration of the windings.
The cricket sound in this case can come from the transformer on the control board or from the motor itself. Inverter compressors installed in refrigerators are especially sensitive to the quality of current. The electronics try to smooth out the interference by modulating the rotation frequency, which is sometimes accompanied by strange sound effects. Bosch And Siemens. The electronics try to smooth out the interference by modulating the rotation speed, which is sometimes accompanied by strange sound effects.
To protect equipment and eliminate acoustic discomfort, it is recommended to use a voltage stabilizer. This will not only remove extraneous noise, but will also extend the life of the refrigerator electronics.
Diagnostics and methods for eliminating noise
Before calling a technician, try to carry out an initial diagnosis. It will help you understand the scale of the problem. First of all, you need to determine whether the sound depends on the operating mode (start-up, active cooling, defrosting).
If the sound comes from the freezer, remove the back panel (after unplugging the refrigerator). Visually inspect the evaporator for ice. If there is ice in only one place or on the fan, the problem is in the defrost system. If there is no ice coat, check the free movement of the fan blades by hand.
The secret of quiet operation
Lubricating the fan hub with silicone oil can temporarily eliminate the whistling, but if the bearing is worn out, only replacing the entire assembly will help. Do not use WD-40, it destroys plastic!
If the sound is coming from below, remove the cardboard cover of the compressor. Carefully (observing safety precautions) press the tubes coming out of the motor with your hand. If the sound has changed, reinstallation of the mounts or rubber shock absorbers is required. Check whether the compressor itself is vibrating against the floor or wall.
When you need to call a technician
There are a number of situations when self-repair is not only useless, but also dangerous. If, after complete defrosting (24 hours without turning on), the sound of the cricket returns within the first hours of operation, then the problem is deeper than simple ice.
Urgent intervention is required if:
- ❄️ The sound is accompanied by a lack of cold in the chambers.
- 🔥 The compressor heats up to temperatures at which it is impossible to touch it.
- ⚡ You can hear the smell of burning or burning plastic.
- 💧 Puddles of oil or water with impurities appear under the refrigerator.
In such cases, there is a high probability of a freon leak, a clogged capillary system or an interturn short circuit in motor windings. Repair requires special equipment: a vacuum pump, a pressure gauge station and refrigerant supplies.
⚠️ Attention: Never try to solder the refrigeration circuit pipes yourself without the appropriate qualifications. Moisture or air remaining in the system will lead to rapid breakdown of the new compressor.
Prevention of extraneous sounds
In order for your refrigerator to operate quietly and not make cricket sounds, it is important to follow the operating rules. Regular defrosting (even for the No Frost system once a year) helps to remove ice from hard-to-reach places that the automation cannot remove.
Monitor the condition of the rubber seals on the doors. If it does not fit tightly, moist air enters the chamber, which leads to increased ice formation on the fan. Wipe the seal and check its elasticity.
Do not place the refrigerator close to the wall. A gap of 10-15 cm is necessary for free air circulation and heat removal from the condenser. Overheating of the rear grille can also affect the way the motor operates and the sounds it makes.
Why does a new refrigerator make strange sounds?
New equipment goes through a “breaking in” period. The motor needs time to develop lubrication, and plastic parts need time to adapt to thermal expansion. If the sound is not accompanied by other symptoms of a breakdown, it may disappear after 2-3 weeks of operation.
Can the sound of a cricket be a sign of a freon leak?
Yes, it can. When there is a leak, the pressure in the system drops and the compressor works overload, trying to gain temperature. A hissing or whistling sound at the location of the leak (often in the foamed part of the housing) may also sound like a chattering sound. This requires a professional leak search and refilling.
Is it dangerous to ignore this sound?
If the sound is caused by icing on the fan, then ignoring it will lead to damage to the fan motor or deformation of the blades. If the reason is in the compressor, its complete failure is possible. It is better to eliminate the cause of the noise at an early stage.