The situation when the refrigerator clicksbut does not start, or makes loud sounds when starting, is one of the most common problems in household appliances. This sound often frightens owners, as it signals an attempt by the unit to start working, which for some reason is interrupted. The click can be single and quiet, or it can be repeated with a certain periodicity, reminiscent of the operation of a metronome.
In most cases, this sound is produced by starting relay or itself compressortrying to overcome the resistance in the system. Ignoring this symptom can lead to complete failure of the motor, the replacement of which is much more expensive than repairing the starting equipment. It is important to understand the physics of the process: electric current is supplied to the motor windings, but if the rotor cannot budge, the protective mechanism opens the circuit, producing a characteristic knock.
Further actions depend on the type of sound produced and accompanying signs: Is the motor housing heating up, is there cold in the chambers, does the light turn on. Diagnostics requires care and compliance with safety precautions, since you will be dealing with electric current under a voltage of 220 volts. In this article we will look at the main causes of malfunctions and ways to eliminate them.
Nature of sound: what exactly is clicking inside?
To effectively fix the problem, it is necessary to accurately identify the source of the sound. In 90% of cases, the culprit is starting relay a small block mounted on the side of the compressor. It is in it that there is an electromagnetic coil and contacts, which, when voltage is applied with a characteristic click, close the circuit of the starting winding. If the startup is successful, a second, quieter click is heard - this is the starting winding turning off.
However, the sound can also come from other elements of the system. For example, thermostat or the electronic control module also makes clicks when switching modes. If your refrigerator makes a loud metallic clanging or buzzing sound that turns into a clicking sound, this may indicate mechanical problems inside compressor or water hammer of the refrigerant. It is important to distinguish normal operating noise from an alarm signal.
Often users confuse relay clicks with operation solenoid valve in No Frost systems, which switches refrigerant flows. This is a normal process, but if the clicking sounds are accompanied by a lack of cold, the problem lies deeper. It is also worth paying attention to the wiring: poor contact in the terminal block can cause sparking and crackling, which is a fire hazard.
⚠️ Attention: Before any diagnostics, be sure to disconnect the refrigerator from the power supply! Working with electrical appliances under voltage is deadly.
To understand the difference in sounds, it is useful to know that a working refrigerator, when started, makes a quiet, one-time click, followed by an increasing hum of the motor. If you hear a series of frequent clicks (clocking) or one loud bang and silence, these are signs of a malfunction. Induction beep can also be a harbinger of a problem with the windings.
Malfunctions of the starting relay and starter
The most likely reason why the refrigerator clicks does not turn on is the failure of the starting relay. This device is responsible for briefly applying increased voltage to the starting winding of the motor in order to spin the shaft. Inside the relay there is a movable core, which, under the influence of current, is drawn in and closes the contacts. Over time, the contacts burn out, and the mechanism itself wears out.
If the relay is faulty, it may click, but not close the circuit, or close it too late, when the engine is no longer able to start. In such cases, the thermal protection is triggered and the cycle repeats again after some time. This phenomenon is called "clocking" of the compressor. Posistor (thermistor), often used in modern relays, can also lose its properties and stop warming up to the desired temperature.
Replacing a relay is one of the simplest procedures in refrigerator repair. It requires no special tools other than a screwdriver and possibly pliers. However, it is important to choose an exact copy of the spare part, since they differ in the type of compressor, power and mounting method. An incorrectly selected relay may not start the motor or, worse, burn its windings.
☑️ Relay diagnostics
When inspecting the removed relay, pay attention to the condition of the internal contacts. If they are blackened or melted, the part requires replacement. Also check the integrity of the housing: cracks can lead to moisture ingress and a short circuit. Electromagnetic relay It should move freely in a vertical plane (if the design requires it), core jamming is unacceptable.
Problems with the compressor: jamming and break
The most serious and expensive problem is the malfunction of compressoritself. If you hear a loud click when you turn it on, the motor hums for a few seconds, and then clicks again and goes silent, this may indicate a mechanical jam. The piston group may have worn out, or the liners have rotated, which blocks the rotation of the shaft.
In such situations, the current in the windings increases sharply, trying to rotate the jammed shaft, but there is not enough strength. The thermal protection relay trips, breaking the circuit, and you hear a click. Trying to turn it on in this case is useless and only finishes off the engine. Sometimes the so-called “wedging” by applying increased voltage helps, but this is a risky procedure, available only to professionals.
Another option is in the motor windings. In this case, the resistance of the windings changes, there is not enough starting torque, and the compressor hums, but does not start. You can check this with a multimeter by measuring the resistance between the contacts. Normal values are usually in the range from 10 to 30 Ohms for the working winding and slightly higher for the starting winding. turn-to-turn short circuit in the motor windings. In this case, the resistance of the windings changes, there is not enough starting torque, and the compressor hums, but does not start. You can check this with a multimeter by measuring the resistance between the contacts. Normal values are usually in the range of 10 to 30 ohms for the operating winding and slightly higher for the starting winding.
Is it possible to revive a jammed compressor?
There is a method of applying increased voltage (380V) for a short time to get the pistons off the ground. However, it is less than 50%, and there is a high risk of permanently burning the windings or damaging the valves. This method is not recommended for use at home.
If diagnostics show that the relay is working properly, but the compressor does not start and gets very hot, it will most likely need to be replaced. This is a complex process that requires evacuation of the system and filling freon. It is almost impossible to carry out this repair independently without special equipment (vacuum pump, pressure gauge station).
Power surges and power supply problems
Often the reason that the refrigerator clickslies not in the equipment itself, but in the parameters electrical networks. If the voltage in the outlet is below normal (less than 190-200 Volts), the current power may not be enough to reliably start the engine. The compressor tries to start, the relay clicks, but the motor only hums and does not gain speed.
In modern models with electronic control, low voltage can lead to incorrect operation of the control module. It can issue a command to start, but due to lack of energy the process is disrupted. In such cases, installing voltage stabilizerhelps, which equalizes the current parameters and protects equipment from overloads.
It is also worth checking the condition of the socket and plug. Oxidized contacts, loose contact in the connector or the use of extension cords of insufficient power lead to voltage drop and sparking. Bad contact This is not only the cause of a non-functioning refrigerator, but also a potential source of fire.
| Symptom | Probable cause | Solution |
|---|---|---|
| One click, silence, cold motor | Faulty starting relay | Replacing the relay |
| Frequent clicks, motor hums | Compressor jammed | Replacing the compressor |
| Clicks at low voltage | Problems with the electrical network | Installing the stabilizer |
| Crackling and clicking inside the camera | Thermal expansion of plastic | Normal (does not require repair) |
Diagnostics and replacement of the starting relay with your own hands
If you determine that the problem lies in the relay, you can replace it yourself. First, remove the refrigerator's rear cover (crankcase) at the bottom of the cabinet. You will see a black compressor barrel with a box attached to the side - this is start relay. Carefully remove the retaining bracket or bar.
Remove the relay from the compressor pins. Usually it is simply put on three contacts. Inspect the insides: if the relay is electromagnetic, inside you will see a copper coil and a movable rod with contacts. If the posistor is a ceramic element. Shake the relay: if something dangles inside, it means the mechanism is damaged and requires replacement.
When purchasing a new part, be sure to check the markings. They are available for different types of compressors (R600a, R134a) and different capacities. Installation is carried out in the reverse order: put the relay on the contacts, secure with a bracket and connect the wires to the terminal block. It is important to observe the polarity of the connection if it is indicated on the diagram.
⚠️ Attention: Make sure that the relay is installed strictly in the position as it was originally. The case often has an "UP" or "TOP" arrow. An inverted relay will not work correctly.
After replacement, turn on the refrigerator. If there is a confident click and the engine starts with a characteristic hum, and after a while cold appears, the repair has been completed successfully. If the clicking continues, the problem may be deeper, for example, in the compressor itself or the wiring.
When a call to the technician is necessary
Despite the appearance simplicity, there are situations when independent repair is dangerous or impractical. If after replacing the relay and checking the voltage the situation has not changed, more complex diagnostics are probably required. Replacing the compressor This is a major repair that requires opening the refrigeration circuit.
For this operation, a set of tools is required: pipe cutter, burner, vacuum pump, scales for refilling refrigerant. In addition, you need skills in working with copper tubing and solder. Unprofessional sealing can lead to a freon leak in a month or, even worse, to a fire in the oil in the system.
You should also call a technician if the refrigerator is under warranty. Any interference with the design, seals on the compressor or damage to the integrity of the tubes automatically voids the warranty. In this case, it is better to contact the authorized service center of the manufacturer.
Another case for a professional is if the clicks are accompanied by a burning smell or smoke. This may indicate a short circuit in the wiring or a burnt-out winding, which requires replacement of the wiring harness or the unit itself. Do not risk the safety of your home.
Prevention and care of the starting system
To avoid problems with starting in the future, provide the refrigerator with the correct operating conditions. First of all, it is a stable voltage. If the light often “jumps” in your area, stabilizer is a must-purchase. It will extend the life not only of the refrigerator, but also of other equipment.
Regularly clean the rear grille of the condenser from dust and animal hair. A clogged condenser leads to overheating of the compressor, the oil in it thickens, and it becomes more difficult to start the engine. This increases the load on the start relay and accelerates its wear. It is enough to clean it once every 6-12 months.
Make sure that the refrigerator is level. Misalignment can lead to improper distribution of oil in the compressor and impede the movement of the pistons. Use a spirit level to check the horizon. Also, do not place the refrigerator close to the wall, ensure air circulation.
☑️ Scheduled maintenance
Following these simple rules will help avoid a situation when The refrigerator clicks and stops freezing. Remember that timely maintenance is cheaper than replacing expensive components. If you notice changes in the sound of the unit, do not put off diagnostics.
Frequently asked questions (FAQ)
Why does the refrigerator click immediately after defrosting?
After defrosting in the system There may be excess oil or moisture remaining, which causes water hammer when first started. The contact in the connector could also have oxidized due to humidity. Let the unit stand turned off for several hours, wipe the contacts dry.
Is it possible to operate the refrigerator if it clicks but freezes?
For a short period of time it is possible, but this is emergency mode. The service life of the compressor in this state is sharply reduced. Clicking sounds mean that the startup is overloaded, which can lead to burnout of the windings at any moment. It is better to replace the relay preventively.
How much does it cost to replace the starting relay?
The part itself is inexpensive (from 500 to 2000 rubles, depending on the model). The services of a replacement technician will cost approximately another 1000-1500 rubles. Self-replacement saves the cost of work.
Does the electronic control module click?
Yes, in modern refrigerators, relays are often built into the electronic unit. They also make a clicking sound when switched. If the module clicks, but the compressor does not start, the track on the board or the relay itself on the board may have burned out.
Is the cracking of plastic inside the chamber dangerous?
No, this is a normal physical process. When the temperature changes (on/off cycles), the plastic contracts and expands, making sounds. This is not a malfunction and does not require repair.