The situation when there is silence in the kitchen, and food inside the refrigerator is already starting to spoil, can take any owner of household appliances by surprise. It is especially alarming when the unit makes a characteristic click, trying to start, but the motor never picks up speed. Start relay triggered, trying to supply current to the motor windings, but the compressor is silent or makes a hum, followed by a second shutdown click.
This is a classic symptom, indicating that the protection system is triggered due to the inability to start the engine. In most cases, the problem lies in the electrical part - from a banal voltage drop to failure starting device or the compressor itself. There is no need to panic, since in many cases, diagnostics can be carried out independently, without calling a technician.
It is important to understand that regular attempts to start with characteristic clicks are not the norm. Motor-compressor experiences colossal overloads at such moments, which can lead to its complete combustion, if the problem is not resolved in time. In this article we will analyze the main causes of the malfunction, methods for identifying them and an algorithm of actions that will help bring the equipment back to life.
The nature of the click: what is happening inside the refrigerator
To understand how to fix the malfunction, you need to understand the physics of the process. The characteristic click you hear comes from starting relay a small electromechanical component mounted on the compressor casing. Its task is to briefly supply increased voltage to the starting winding of the engine in order to spin the rotor shaft.
If the engine is working properly, it starts, the current in the circuit drops, and the relay opens, switching the motor to operate the main winding. However, if the compressor is stuck or the relay fails, the current does not drop. At this moment, thermal relay or the starter's protective mechanism is triggered, breaking the circuit, which we hear as a second click. After cooling, the cycle repeats.
⚠️ Attention: If you hear frequent clicks at intervals of several minutes, immediately unplug the refrigerator. Prolonged operation in this mode can permanently render compressor failure, turning a simple repair into an expensive replacement of the unit.
Often owners confuse the sounds of the refrigerator. A quiet click of the thermostat when turned on and off in operating mode is considered normal. But if the clicks occur in a “series” without reaching the cooling mode, this is a sign of an accident. Electric arc, which occurs when the contacts in a faulty relay open, can also cause a wiring fire.
Diagnostics of the starting relay and thermal protection
The most likely reason why the refrigerator clicks but does not turn on is a faulty start relay. This element is inexpensive and often fails due to power surges or natural wear and tear. It is difficult to visually determine the breakdown, since the relay housing is usually covered with a plastic casing.
To check, you need to remove the back panel of the refrigerator to gain access to the compressor. After disconnecting the relay from the compressor contacts, you need to shake it. If knocking or rattling is heard inside, it means that the mechanism is damaged and requires replacement. It is also worth inspecting the contacts for the presence of carbon deposits or melting.
- 🔌 Visual inspection: Check the integrity of the plastic housing of the relay and the absence of traces of burning or soot on the contacts.
- 🔊 Sound test: Shake the removed relay - extraneous noise inside indicates a detached core or destruction of the mechanical parts.
- 🧊 Checking the reed switch: In some models, a PTC type relay (posistor) is tested with a multimeter; in a cold state it should have resistance, and when heated, it should go into a break.
If the relay is working properly, the problem may lie in thermal relay, which often comes complete with the starter. It protects the motor from overheating. If its contacts are “stuck” or, conversely, do not close, the circuit will not be assembled. Replacing these components is a simple procedure, but it requires precise selection of the model for your compressor.
Problems with the compressor: wedge or interturn short circuit
If replacing the relay did not help and the refrigerator still clicks but does not start, the situation becomes more complicated. The next suspect is the motor-compressor itself. There are two main failure scenarios: a mechanical “wedge” of the piston group or an electrical interturn short circuit of the windings. motor-compressor. There are two main failure scenarios: a mechanical “wedge” of the piston group or an electrical interturn short circuit of the windings.
In the event of a mechanical jamming of the piston, the engine physically cannot turn. The relay gives an impulse, a click is heard, but the shaft stands still. An attempt to start such a compressor by “push” or by increasing the voltage at home is dangerous and often leads to final breakdown. An interturn short circuit is diagnosed by strong heating of the housing and humming.
For initial diagnosis, you can try (carefully!) applying voltage directly, bypassing the relay, but only if you have electrical skills. If, when connected directly, the compressor hums, but does not spin, and at the same time gets very hot, it is most likely “stuck.”
⚠️ Attention: Direct connection of the compressor to a 220V network without a start relay is only permissible for a few seconds for diagnostics. Long-term operation in this mode is guaranteed to burn out the motor windings.
Sometimes the compressor may be working properly, but it does not have enough power to start due to low voltage in the network. If your outlet voltage drops below 190V, the motor may hum and click but will not start. In such cases, installing a voltage stabilizer helps..
Malfunctions of the thermostat and wiring
Do not discount other elements of the electrical circuit. If thermostat (the thermostat) is faulty, it may simply not give a signal to turn on the compressor, although in this case there are usually no clicks. However, if the thermostat contacts are burnt and “stuck” in the broken position, the refrigerator will not work.
The problem with the wiring is more pressing. Oxidized contacts in connectors suitable for a compressor or relay create high contact resistance. The current flows, but it is not enough to start. Visually, such places are often visible by blackening of the insulation or melting of the plastic.
How to check the thermostat?
To check the thermostat, you need to remove it and short-circuit the wires coming from the network directly (bypassing the thermostat itself). If the refrigerator turns on, then the problem is with the temperature sensor. Don’t forget to unplug the device from the outlet before doing this!
It is also worth checking the integrity of the wires going to the camera lighting bulb. In some older models, the circuit is designed so that a short circuit in the lamp socket can affect the overall circuit, although this is rare. Inspect all accessible parts of the wiring for damage by rodents or mechanical breaks.
Fault diagnosis table
For convenience, we will systematize the main symptoms and probable causes in a table. This will help you quickly navigate the nature of the breakdown.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Loud clicking, buzzing, then silence | Faulty start relay | Low | Replace the relay |
| Series of clicks, compressor hot | Stuck compressor | High | Replacement of the compressor |
| Quiet clicks, no start, cold is normal | Thermostat is faulty | Medium | Replacing the thermostat |
| There are clicks, but the motor is silent | Open circuit or oxidation of contacts | Average | Wiring revision |
As can be seen from the table, in most cases the problem is solvable. However, if the diagnosis indicates a breakdown of the compressor, independent repair is only possible if you have special equipment for filling with freon and soldering of copper tubes.
Algorithm of actions when a malfunction is detected
If you hear the refrigerator clicking but does not turn on, act sequentially. Chaotic switching on and off can only aggravate the situation. First of all, ensure safety and conduct an initial visual inspection.
- 🛑 Shutdown: Unplug the cord from the outlet. Let the equipment stand turned off for at least 30-40 minutes. This is necessary to cool down the thermal relay and compressor.
- 👀 Inspection: While the equipment is cooling, check the outlet (connect another device to it), inspect the power cord for kinks.
- 🔧 Access: Remove the back cover, find the compressor and visually assess the condition of the wires and relays.
After cooling, you can try to turn on the refrigerator again. If the clicks are repeated with the same frequency, but it doesn’t get cold inside, it’s time to move on to replacing the components. If you do not have experience working with electrical equipment, it is better to stop at the diagnostic stage and call a specialist.
⚠️ Attention: Modern inverter compressors are controlled by an electronic module. If you have a refrigerator with a system No Frost and an inverter motor, the method for diagnosing clicks is different. There, clicks can be made by the control module, and not by a mechanical relay.
☑️ Action plan in case of breakdown
When you need to call a professional technician
Despite the desire to save money, there are situations when self-repair is impractical or dangerous. If the diagnostics showed that it itself is faulty compressor, to replace it you will need a vacuum pump, a pressure gauge station and a supply of refrigerant.
Also, a master is needed if, after replacing the relay and checking the wiring, the refrigerator still does not start. This may indicate a complex malfunction in the electronic control module, which requires flashing or replacing the board. In modern models Smart refrigerators it is impossible to carry out diagnostics without special software.
In addition, if you live in an apartment building and are not confident in your abilities when working with live electrical appliances, the risk is not justified. Professional repairs often provide a guarantee on the replaced components, which is an important factor in the case of a compressor.
Is it possible to restore a jammed compressor?
There is a “wedging” method by applying increased voltage or mechanical action, but its effectiveness is less than 10%. In 90% of cases, such a compressor either burns out completely or does not work for long.
Prevention of repeated breakdowns
To prevent the problem of “clicking, but does not turn on” from reoccurring, it is important to ensure stable operating conditions for the equipment. Voltage surges are the main enemy of compressors. Installing a high-quality stabilizer or at least a voltage control relay will help protect an expensive unit.
Regularly clean the condenser (black grill) at the back of the refrigerator from dust and animal hair. A clogged heat exchanger leads to overheating of the compressor, which causes thermal relay to operate more often, reducing its service life. Also, do not place the refrigerator close to the wall, ensuring air circulation.
Following these simple rules will extend the life of your equipment. Remember that a timely response to the first signs of malfunction, such as frequent clicks or unusual noise, allows you to avoid costly repairs in the future.
Why does the refrigerator click immediately after defrosting?
If you have just defrosted the refrigerator, turned it on, and it started clicking, you may have been too hasty. There could be condensation left in the system, or the compressor did not have time to cool down. Also, during defrosting, electrical parts are often flooded with water. Let the equipment dry completely (24 hours) before turning it on.
Can a working refrigerator click?
Yes, single clicks when turning on and off are the norm. The No Frost system may also make clicking noises when the dampers or defrost are operating. The alarm should be sounded only if the clicks are frequent, rhythmic and accompanied by a lack of cold.
How much does it cost to replace the starting relay?
The relay itself is inexpensive (from 500 to 1500 rubles depending on the model). The work of a master to replace it is usually estimated at 1000-2000 rubles. This is one of the most budget-friendly types of repairs.
Is it dangerous to leave a clicking refrigerator on?
Yes, it is a fire hazard. The start relay can become very hot, melt and ignite the plastic casing or wiring. In addition, you risk burning out the windings of the compressor, the replacement of which is very expensive.
Does the temperature in the room affect startup?
Yes, if the room is too hot (above +30°C), it is more difficult for the compressor to start and operate. The thermal relay can operate faster. Also in winter, in an unheated room, the oil in the compressor thickens, which makes starting difficult.