The situation when a characteristic click is heard in the refrigerator, but the long-awaited hum of the compressor never occurs, causes the owner natural anxiety. This sound often indicates an attempt to start the engine, which for some reason was unsuccessful. Regular clicking may indicate that the protective relay is turning off the power, preventing a more serious breakdown, but ignoring this signal can lead to failure of an expensive compressor.
In some cases, periodic cracking is an absolutely normal physical process associated with the expansion or contraction of case materials under the influence of temperature changes. However, if the sound becomes loud, repetitive and is accompanied by a lack of cold in the chambers, it is necessary to carry out a thorough examination. Understanding the nature of the noise is the first step to solving the problem without calling a technician. system diagnostics. Understanding the nature of the noise is the first step to solving the problem without calling a professional.
Do not panic ahead of time, since in many cases the cause lies in simple malfunctions that can be fixed independently or at minimal cost. It is important to listen carefully to the nature of the sound: is it a dry electric click, a dull thud or a crack? Answers to these questions will help localize the source of the problem.
Natural causes of noise: when not to worry
Before you grab the tools, you should rule out physics. Modern models of refrigerators, especially systems No Frost, are equipped with plastic internal panels and air ducts. With a sharp change in temperature, these materials can deform, producing sounds resembling clicks or crackles. Thermal expansion Plastic is a normal phenomenon that does not require intervention.
The refrigerant circulating through the tubes can also be a source of sound. If the refrigerator has just been defrosted or has been loaded with warm food, the rate of gas exchange increases. At this moment liquid freon may gurgle or click as it passes through the capillary tube.
It is important to distinguish the nature of the sound. Natural sounds are usually quiet, infrequent and not cyclical over a short period of time. If clicks are repeated every few minutes with enviable regularity, and the compressor does not start, we are talking about a technical malfunction.
Malfunctions of the starting relay: the most common cause
The most likely culprit for the situation when the refrigerator clicks and does not turn on is the starting relay. This small element is responsible for supplying voltage to the compressor windings at the moment of start. If the relay contacts are oxidized or burnt, the circuit closes with a characteristic click, but no current flows to the motor.
It is difficult to visually determine the problem, since the relay is located in a black box on the back wall of the unit. However, if you hear a series of clicks with an interval of 2-3 minutes, this is a classic symptom faulty starter. The compressor tries to start, the current increases sharply, the thermal protection is triggered and opens the circuit, after which the cycle repeats.
How to check the relay at home?
Remove the relay from the compressor (after disconnecting the refrigerator from the network) and shake it near your ear. If a ringing or knocking sound is heard inside, it means that the mechanical part is damaged and requires replacement.
Replacing this element is one of the simplest procedures in repairing household appliances. It is enough to purchase a similar relay for your model (for example, Danfoss or Indesit) and install it, observing the correct orientation along the arrow.
☑️ Diagnostics of the start relay
Problems with the compressor: interturn short circuit and jamming
If replacing the relay did not help, the situation may be more serious. Clicks may indicate something in the motor windings. In this case, the motor hums, tries to turn over, but due to a violation of the electromagnetic field it cannot gain speed, and the thermal relay turns it off again. interturn short circuit in the motor windings. In this case, the motor hums and tries to turn over, but due to a disturbance in the electromagnetic field it cannot gain speed, and the thermal relay turns it off again.
Another option is mechanical jamming of the piston group. This often happens after a long period of inactivity or if moisture has entered the system, causing corrosion. The compressor locks up and you only hear a dull thud or click every time you try to start. In this case, compressor repair is often impractical; its complete replacement is required.
You can diagnose the short circuit of the windings using a multimeter by measuring the resistance between the contacts. However, even with normal resistance readings, the engine may not start under load. Professionals use special devices to check starting current.
The role of the thermostat in the occurrence of clicks
The thermostat (thermostat) is a device that controls the refrigerator turning on and off depending on the temperature in the chamber. If its contacts or mechanism are stuck, it may not give a signal to start, or, conversely, constantly try to turn on the compressor, causing clicking.
Often the problem is solved by simply replacing the thermostat. In some models, for example Atlant or Stinol, these elements fail quite often. Signs of a malfunction can also be: lack of cold when the engine is running or, conversely, continuous operation without shutting down.
To check, you can temporarily close the thermostat contacts (if the design allows and you are confident in your actions). If after this manipulation the refrigerator starts up and starts freezing, it means that the problem was in the temperature sensor.
Comparative table: diagnostics by sound and symptoms
To simplify troubleshooting, you can use the following table, which systematizes the main symptoms and their probable reasons.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Single click, silence | Faulty start relay | Low | Replace the relay |
| Series of clicks, humming | Compressor jammed | High | Replacement of the compressor |
| Crackling inside the chamber | Thermal expansion of plastic | Not required | Observation |
| Clicking when setting temperature | Thermostat operation | Normal | No action |
| Clicks and no cold | Freon leakage / Clogged | Medium | Refilling the system |
Analysis of the behavior of your refrigerator in comparison with the data in the table will allow you to quickly determine the vector of further actions. Do not forget that the accuracy of diagnostics directly affects the cost and time of equipment restoration.
The influence of voltage drops and wiring
Often the reason that the refrigerator clicks but does not work is problems with the power supply. Voltage surges in the network can lead to malfunctions of electronics or damage to starting equipment. If the lights in your house flicker frequently, it is recommended to install a voltage stabilizer.
It is also worth checking the socket into which the device is plugged in. Poor contact, oxidized terminals, or loose wires inside the socket can cause sparking and characteristic clicking sounds. Try plugging the refrigerator into another outlet, preferably through a surge protector with protection.
⚠️ Attention: Using cheap Chinese extension cords to connect powerful household appliances such as a refrigerator often leads to burnt contacts and false symptoms of a malfunction of the unit itself.
If you live in a private house or in a country house where the quality of the electrical network is poor much to be desired, the risk of compressor failure due to low voltage increases significantly. The motor may hum, but not start, which quickly leads to its combustion.
Why can’t you turn on the refrigerator immediately after moving?
During transportation, oil from the compressor could get into the cooling circuit. If you turn on the unit immediately, a water hammer may occur, which will damage the compressor. Let it sit for 4-8 hours.
When you need to call a technician
There are a number of situations when self-repair is not only ineffective, but also dangerous. If you suspect a refrigerant (freon) leak, it is absolutely forbidden to interfere with the system without special equipment (vacuum pump, pressure gauges, scales). Freon charging requires precise knowledge of the type of refrigerant and its quantity.
Also the help of a specialist necessary if you suspect a malfunction of the electronics (control module) in modern models with displays. An attempt to “reflash” or repair the control board without a diagram and experience can lead to complete failure of the board.
⚠️ Attention: Opening the sealed circuit of a refrigerator without a license and special equipment is prohibited by the legislation of many countries due to the environmental hazards of refrigerants.
If after replacing the relay and checking the socket, the refrigerator continues to click and do not cool; further diagnosis requires professional skills. The technician will be able to accurately determine whether it is worth repairing the old unit or whether it is cheaper to purchase a new one.
Prevention and proper care
To extend the life of the compressor and avoid starting problems, it is important to follow the operating rules. Do not overload the refrigerator with food, leave a gap between the back wall and the furniture for air circulation. Regular defrosting (for drip systems) also reduces the load on the motor.
Keep the condenser (grid at the back) clean, which is often clogged with dust and animal hair. A clogged condenser leads to overheating of the compressor and its premature wear. Cleaning with a vacuum cleaner once every six months is an excellent preventive measure.
Following these simple rules will help avoid a situation when your refrigerator starts making scary sounds. Remember that timely maintenance is cheaper than major repairs or buying new equipment.
Is it possible to operate a refrigerator if it clicks, but freezes?
If the cold in the chambers remains, the temperature is normal, and the clicks are rare and quiet (physics of plastic), operation is possible. However, if the clicks are loud, frequent and come from the compressor, this is a sign of imminent failure. It is better not to risk the products and carry out diagnostics.
How much does it cost to replace a starting relay?
The cost of the relay itself is usually low (from 500 to 1500 rubles depending on the model), but the services of a replacement technician can cost more than the part itself. Replacing it yourself saves the budget, but requires minimal technical skills.
Why does the refrigerator click after defrosting?
Immediately after defrosting, the thermostat takes time to detect the temperature increase and give the command to start. If clicks occur immediately after being plugged in, this is normal (relay operation). If the clicks continue for a long time and there is no cold, perhaps water has entered the system or the seal is broken.
Is it dangerous to ignore compressor clicks?
Yes, it is dangerous. Constant attempts to start in the event of a malfunction (jamming or short circuit) lead to overheating of the motor windings. As a result, the compressor can burn out completely, and replacing it is the most expensive part of repairing a refrigerator, often accounting for up to 70% of the cost of a new appliance.