The situation when the refrigerator clicksbut does not turn on, often takes owners of household appliances by surprise. This characteristic sound can occur at varying frequencies, from single clicks every few hours to a series of rapid knocks every few seconds. Understanding the nature of these sounds is critically important, since they often signal an attempt starting the compressorwhich for some reason cannot begin full operation.
In most cases, clicks are made starting relay or thermostat, trying to start the engine, however, the problem may also lie in more serious faults in the electrical circuit. Ignoring these symptoms can lead to complete failure of the motor-compressor, the replacement of which is an expensive procedure. In this article we will analyze in detail all the possible causes of extraneous sounds and methods for eliminating them.
Before embarking on complex diagnostics, you need to make sure that the equipment is installed correctly. Users often forget about simple things that affect the operation of the unit. If you hear strange sounds, do not rush to call a technician - perhaps the solution to the problem is within your reach and does not require special tools.
Is this normal: differences between operating sounds and a malfunction
Not every sound made by the refrigerator is a sign of a breakdown. Modern models, especially those with the No Frostsystem, produce various noises during normal operation. It is important to be able to distinguish between normal operation and an alarm. For example, periodic clicks can be produced by thermostats or valves that regulate the flow of refrigerant.
If the clicks occur rarely (once every 30-60 minutes) and are accompanied by the engine starting, which then runs smoothly, most likely the equipment is working. However, if you hear a series of clicking sounds followed by silence or a humming noise that ends abruptly, this indicates a problem. In such a situation, the compressor receives an impulse, but cannot turn the shaft. unsuccessful attempt to start. In such a situation, the compressor receives an impulse, but cannot turn the shaft.
Particular attention should be paid to the nature of the sound. A dull, soft click is usually produced by the thermostat when switching modes. A sharp, metallic click or crackling sound most often indicates problems in the electrical part, for example, protection in start relaytriggered. If the sound is accompanied by a burning smell or sparking, operation must be stopped immediately.
Main causes of clicks: start relay and thermostat
The most likely culprit for characteristic clicks is starting relay. This small device is responsible for supplying voltage to the motor windings at the time of start. When a relay becomes worn or dirty, its contacts begin to burn, causing an audible crackling or clicking sound. At this moment, the compressor tries to start, but the protection instantly turns off the power.
The second common cause is a malfunction of thermostat (thermostat). If the temperature sensor does not correctly read the readings inside the chamber, it may command the compressor to turn on too often or, conversely, not give the command to start, making a clicking sound at the moment of switching. In models with electronic control, this function is performed by control modulewhich can also make sounds during failures.
- 🔌 Start relay: Most often it fails due to overloads or natural wear of contacts, requiring replacement.
- 🌡️ Thermostat: Mechanical failure of the sensor leads to chaotic switching on and characteristic clicks.
- ⚡ Wiring: Oxidation of contacts in the power circuit can cause sparking and sounds similar to clicks.
Diagnostics of these elements requires caution. Before checking the relay or thermostat, it is necessary de-energize the refrigerator. Removing the protective casing at the back of the unit will allow you to visually inspect the relay for melting or blackening. If there are cracks or traces of burning on the relay body, its replacement is required.
How to check the relay with a multimeter?
To check the relay, you need to “ring” its contacts with a multimeter. In good condition, the resistance should be close to zero. If the device shows infinity or the resistance jumps strongly when shaken, the relay is faulty and requires replacement.
Problems with the compressor: motor wedge and interturn short circuit
The most unpleasant scenario when the refrigerator clicks is a malfunction of the motor-compressor itself. If the starting relay is working properly, but the engine hums, clicks and immediately turns off, a problem may have occurred. This means that the piston group is stuck in one position and cannot start moving. the motor wedge. This means that the piston group is stuck in one position and cannot move.
Another reason may be interturn short circuit in the motor windings. In this case, the inrush current becomes too high, and the thermal protection relay instantly opens the circuit, making a loud click. Repeated attempts to start in this mode can completely “kill” the compressor, turning it into metal scrap.
⚠️ Attention: Attempts to start a jammed compressor using external devices or blows to the housing at home are extremely dangerous. This can lead to depressurization of the system, fire or electric shock.
Symptoms of problems with the compressor are often complemented by strong heating of the motor housing. If, after a series of clicks, you touch the back wall of the refrigerator near the engine and feel intense heat, this is a sure sign that the unit is operating in emergency mode. In such cases, a qualified refrigerator repair replacement of the motor-compressor is required.
The influence of voltage drops and wiring
Unstable voltage in the electrical network is a common reason why the refrigerator clicks it does not turn on. If the voltage drops below the permissible threshold, the compressor cannot start and the protection relay begins to constantly trip, making characteristic sounds. This is especially true for holiday villages or old apartment buildings.
It is also worth checking the condition of the refrigerator socket and plug. Loose contacts, oxidation or melted plugs can create resistance that prevents the engine from starting properly. At the point of poor contact, micro-sparking may occur, which is also heard as crackling or clicking.
To protect equipment from power surges, it is recommended to use voltage stabilizer or a surge protector with a protection function. This will not only prevent clicks, but will also extend the life of the electronics and the compressor.
Fault diagnosis: step-by-step algorithm
To accurately determine the reason why the refrigerator clicks, it is necessary to carry out sequential diagnostics. You should always start with simple actions, gradually moving on to complex ones. Do not try to disassemble the sealed circuit or open the compressor yourself - this is a task for professionals.
The first step should always be a visual inspection and power check. Make sure that the plug is firmly seated in the socket and that the cord is not damaged. Then listen to the nature of the sounds: do they come from the bottom (compressor) or from the top (thermostat, electronics).
☑️ Primary diagnostics of the refrigerator
If simple methods did not help, you will need to test the elements with a multimeter. Check the integrity of the compressor windings, the resistance of the start relay and the operation of the thermostat. All measurements are carried out only with the device completely disconnected from the network.
Comparative table of symptoms and solutions
For ease of diagnosis, we have collected the main symptoms in a table. This will help you quickly navigate the nature of the malfunction and make the right decision on further actions.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Single click, then silence | Faulty start relay | Low | Replacement relay |
| Series of clicks, compressor hums | Engine wedge or short circuit | High | Replacing the compressor |
| Clicks every 10-15 minutes | Thermostat is faulty | Average | Replacing the thermostat |
| Clicking and blinking indicators | Electronics failure or power surge | Average | Reboot or repair boards |
As can be seen from the table, in most cases the problem can be solved by replacing one component. However, if you do not have the skills to work with electrical appliances, it is better not to take risks. Incorrect assembly or installation of a part can lead to a short circuit.
Is it possible to temporarily short-circuit the relay?
Technically, it is possible to start the compressor directly, but this is dangerous. Without protection, the engine can burn out in a few minutes. This method is used only by craftsmen to briefly check the performance of the motor.
When it is necessary to call a specialist
There are situations when self-repair is not only impractical, but also dangerous. If after replacing the start relay and checking the socket the refrigerator continues to click and does not cool down, the problem lies deeper. Opening the cooling system requires special equipment: a vacuum pump, a pressure gauge station and supplies of freon.
Also, the help of a specialist is necessary if you find a refrigerant leak (oily spots under the refrigerator, smell of gas) or if the compressor is running very loudly and vibrating. In these cases, a professional refrigerator refilling replacement of the motor is required.
⚠️ Attention: Freon used in modern refrigerators can be fire hazardous or toxic if mishandled. Self-repair of a sealed circuit is prohibited by safety rules.
Do not forget that tampering with the design of the device may lead to loss of warranty. If your refrigerator is under warranty service, any attempts at self-repair should be excluded and immediately contact an authorized service center.
Prevention and care of the starting system
To avoid situations when the refrigerator clicks stops working, it is important to follow the operating rules. Regularly clean the condenser (grid at the back) of dust, since overheating of the compressor is one of the common causes of its failure. Ensure free air circulation around the appliance body.
Try not to overload the network by connecting the refrigerator through cheap extension cords or tees. A direct connection to a reliable, grounded outlet is the best way to protect your electronics. It is also not recommended to turn the device off and on - the minimum interval between starts should be at least 10-15 minutes.
Following these simple recommendations will significantly extend the life of your refrigerator and avoid unpleasant surprises in the form of clicks and lack of cold. Remember that prevention is always cheaper than major repairs.
Why does the refrigerator click immediately after defrosting?
After defrosting, excess moisture may remain in the chamber, which gets onto the electrical contacts, causing a short circuit or incorrect operation of the sensors. Thermal shock to the compressor is also possible if it is turned on too early. Let the equipment dry completely and stand turned off for 3-4 hours before turning it on.
Can a new refrigerator click?
Yes, new refrigerators can make clicking noises during the break-in period. This is where the plastic parts of the case expand and contract due to temperature changes, and the thermostat is also adjusted. If clicks are not accompanied by a lack of cold, this is normal.
Is it dangerous to ignore clicks?
Ignoring clicks can lead to burnout of the compressor windings or a fire at the point of poor contact. If clicks appear suddenly and are regular, this is always a signal of a malfunction that cannot be ignored.
How much does it cost to replace the start relay?
The cost of the relay itself is usually low, but the price may vary depending on the model of the refrigerator and the brand of the spare part. The main cost of the service consists of the work of the specialist and the visit. Replacing it yourself saves money, but requires basic skills.
What to do if the refrigerator clicks but does not freeze?
You must immediately unplug the appliance to prevent the compressor from burning out. Check if the light in the chamber is on (if there is current). If everything is fine with the power supply, most likely the problem is in the start relay or the compressor itself, and you need to call a technician.