The situation when a refrigerator Don suddenly begins to make extraneous sounds often takes the owner by surprise. The clicks can be barely noticeable or resemble loud bangs, frightening household members and raising concerns about the safety of food. In most cases, these sounds indicate the operation of electrical circuits, but sometimes indicate a serious breakdown of the unit.
Primary diagnosis requires careful listening to the nature of the sound. If the clicks are rhythmic and coincide with the moments when the motor is turned on or off, this is, as a rule, normal operation start-up protection relay. However, if the sound is chaotic, accompanied by crackling or buzzing, and there is no cooling, deep technical intervention is necessary.
It is important to understand that ignoring the first symptoms can lead to failure of an expensive compressor. In this article, we will analyze in detail the mechanics of the occurrence of noise in brand refrigerators Don and determine when you can handle it yourself, and when you need to call a specialist.
Natural sounds of refrigeration equipment
Not all sounds that a household appliance makes are a sign breakdowns. Modern and old models of refrigerators Don in the process of cyclic operation produce a number of acoustic effects that are considered the norm. Understanding the physics of these processes will help to avoid unnecessary panic and unnecessary diagnostic costs.
Most often, quiet clicks are heard at the moment when thermostat records the achievement of the set temperature and opens the electrical circuit. The compressor stops and refrigerant pressure is redistributed in the system. This process may be accompanied by a characteristic sound reminiscent of a blow on a metal surface or a click.
- 🔊 Rhythmic clicks every 20-40 minutes - a sign of the thermostat being turned on normally.
- 💧 Gurgling and overflow of liquid inside the housing - the movement of freon through evaporator tubes.
- 🧊 Cracking of plastic or metal - thermal expansion of materials when temperature conditions change.
Particular attention should be paid to models with the system No Frost. In them, clicks can be made by dampers that regulate air flow, or by a defrost timer mechanism. If the refrigerator freezes normally and the clicks do not cause acoustic discomfort, most likely the equipment is working properly.
Failure of the start-protection relay and thermostat
The most common technical cause of loud clicks is the failure of the start-protection relay. This small element is responsible for starting the compressor engine. When a relay wears out or burns out, it fails to complete the circuit the first time, resulting in a loud click followed by a hum or silence.
If you hear a series of clicks followed by an attempt to start the engine, but it immediately stalls, the problem almost certainly lies in starter. The compressor tries to start, receives an impulse, but due to a faulty relay, the circuit opens and the cycle repeats. This condition is dangerous because the motor windings can overheat.
⚠️ Attention: If you observe cyclic startup attempts (click-hum-click-silence) more than 3-5 times in a row, immediately unplug the refrigerator. Continuing to operate in this mode is guaranteed to lead to combustion of the compressor.
The second suspect is thermostat. If its contacts are oxidized or stuck, they may spark, producing a characteristic crackling or clicking sound even when the temperature in the chamber has not yet reached the shutdown threshold. Replacing this unit usually does not require calling a technician and can be done independently if you have basic skills.
How to check the relay yourself?
To check the relay, it must be removed from the compressor and shaken. If you hear a rattling sound inside (as if from a broken piece of ceramic), it means that the trigger tablet or coil is damaged and requires replacement. You can also test the contacts with a multimeter.
Problems with the compressor: water hammer and wear
The compressor is the “heart” of the refrigerator Don, and its malfunctions are the most serious. If the clicking sounds come directly from the motor and are accompanied by strong vibration or metallic clanging, this may indicate mechanical wear of internal parts or water hammer. Water hammer occurs when liquid freon or oil enters the compressor cylinder at the moment the piston begins to move. The liquid does not compress like a gas, so there is a sharp shock that is transmitted to the body and is heard as a loud knock. This often happens when the refrigerator is improperly transported or there is a refrigerant leak. water hammer.
Water hammer occurs when liquid freon or oil enters the compressor cylinder at the moment the piston begins to move. The liquid does not compress like a gas, so there is a sharp shock that is transmitted to the body and is heard as a loud knock. This often happens when the refrigerator is transported incorrectly or there is a refrigerant leak.
The problem can be diagnosed by the nature of the sound. Mechanical wear of the bearings or piston group produces a constant hum with periodic knocking. If the sound is similar to a hammer hitting metal at the moment of startup, the risk of damage to the compressor valves is very high.
Case deformation and thermal expansion
Sometimes the sound source is not inside mechanism, but in the materials of the case itself. During sudden temperature changes, for example, after defrosting or loading a large amount of warm food, thermal expansion of plastic and metal occurs.
The internal plastic lining of the chambers and the external metal lining have different expansion coefficients. When they rub against each other or against the insulating layer, sounds very similar to clicks or even gunshots can be heard. This is especially typical for budget models, where the quality of assembly and fit of parts may not be ideal.
Usually such sounds do not pose a threat to the functionality of the unit. They can occur in the first hours after switching on or after intense work. However, if the clicks become constant and are accompanied by the appearance of cracks in the plastic, it is worth checking the integrity of the fastening elements of the shelves and guides.
- 🌡️ A sharp change in temperature inside the chamber causes expansion of the materials.
- 🏗️ Loose panel fastenings can increase the resonance of sounds.
- 🧱 Thermal insulation (polyurethane foam) may produce a cracking sound when drying or aging.
The influence of improper installation on the noise level
Often the cause of strange sounds, including clicks and vibrations, is a banal violation of installation rules. If the refrigerator Don stands unevenly, the load on the compressor is distributed unevenly, which leads to displacement of the tubes and their collision with the body or with each other.
The vibration of the running motor is transmitted to the floor. If the floor is uneven or the legs of the refrigerator are not adjusted, resonance will occur. The tubes leading to the compressor may begin to vibrate and hit the metal walls, creating a rhythmic knocking sound that can easily be confused with a broken relay.
☑️ Diagnostics of the refrigerator installation
To eliminate the problem, it is necessary to inspect the space around unit. Make sure that there is a gap of at least 5-7 cm between the back of the refrigerator and the wall. Also check that the tubes are not touching each other. If a contact is detected, carefully (only when the device is turned off!) separate them or lay insulating material.
Comparative table of symptoms and solutions
For ease of diagnosis, the main symptoms of malfunctions and methods for eliminating them are summarized in a table. This will help you quickly figure out the nature of the problem.
| Sound type | Probable cause | User actions | Need for a technician |
|---|---|---|---|
| Quiet single click when turning off | Thermostat operation | Observation, normal | No |
| Series of clicks, motor does not start | Malfunction of the starting relay | Disconnect from the network | Yes (or replace it yourself) |
| Loud metallic knock at start | Water hammer, compressor wear | Turn off urgently | Yes (complex repair) |
| Plastic crackling, clicks in the camera | Thermal expansion | Check loading | No |
| Vibration with periodic knocking | Touching handsets or uneven floor | Align, separate handsets | No |
Prevention and operating rules
To extend the life of the refrigerator Don and to avoid annoying clicks, it is important to follow the operating rules. Regular defrosting (for drip systems) prevents the formation of an ice coat, which can disrupt heat transfer and create unnecessary load on the system.
Do not load products into the chambers whose temperature is significantly higher than room temperature. This causes a sharp increase in the load on the compressor and thermostat, which can lead to sticking of contacts and accelerated wear of the relay. Also keep an eye on the cleanliness of the condenser at the back: dust impairs heat transfer, causing the motor to work longer and more intensely.
⚠️ Attention: Technical characteristics and location of components in different models of Don refrigerators may vary. Before starting any disassembly work, be sure to check the official instructions for your specific modification.
Regularly check the door for tight fit. If the seal wears out, warm air enters the chamber, causing the compressor to turn on more often than usual. Frequent on-off cycles shorten the life of the start relay and increase the likelihood of clicks.
How to extend the life of the compressor?
Do not place the refrigerator close to the wall, ensure good ventilation at the back. Dust on the back of the radiator is the main enemy of effective cooling. Vacuum the rear grille every six months.
Frequently asked questions (FAQ)
Why does the Don refrigerator click but does not freeze?
This is a classic symptom of a malfunction of the start relay or the compressor itself. The relay tries to start the motor (clicking) but cannot, so no cooling occurs. Relay replacement or compressor diagnostics is required.
Is it normal for the refrigerator to click immediately after defrosting?
Yes, this is normal. When defrosting, a sudden change in temperature occurs, materials contract and expand, causing sounds. Also, after switching on, the compressor can work in a stronger mode, which is accompanied by more frequent clicks of the thermostat.
Is it possible to continue to use the refrigerator if it clicks?
If the clicks are quiet and rare (thermostat operation) - you can. If the clicks are loud, frequent and accompanied by a lack of cold or a buzzing sound, operation is dangerous and can lead to complete failure of the equipment.
How much does it cost to replace a relay in a Don refrigerator?
The cost of the relay itself is low, but the price of a technician’s service may vary. Self-replacement is possible if you have the tools, but requires caution when working with electricity.
Does the new refrigerator click when you first turn it on?
Yes, when you first start the system, the thermostat is calibrated, and the clicks may be more noticeable. If after a day of operation the sound does not change and there is cold, there is nothing to worry about.