The situation when you open the refrigerator, and it’s warm there, and the unit itself makes periodic clicks, but does not start, always takes you by surprise. This is a classic symptom of an electrical or mechanical problem with the compressor and requires immediate attention. A characteristic clicking sound usually indicates an attempt by the starting relay to turn on the engine, but for some reason this process is interrupted, and the system goes into protection.
Before panicking and looking for a service phone number, it is necessary to carry out initial diagnostics, which often reveals trivial problems with the power supply. It is important to understandthat ignoring these sounds can lead to final failure expensive compressor, so you need to act quickly but carefully. In most cases, the problem lies in one of several nodes, which we will discuss in detail below.
Further actions depend on exactly how your refrigeration unitbehaves: whether the motor hums after a click, whether there is vibration, or absolute silence. We will look at action algorithms for various models, be it the good old Atlant or modern LG with an inverter system. Your task is to consistently eliminate simple reasons so as not to overpay for calling a technician to replace the plug or defrost.
Primary diagnostics and checking the power supply
The very first thing to do when you hear strange sounds from kitchen appliances - make sure the voltage in the network is stable. Often voltage surges or insufficient power of the socket prevents the compressor from starting, triggering the protective mechanisms. Try plugging the refrigerator into a different outlet, preferably in another room, to eliminate problems with a specific connection point.
Carefully inspect the power cord and plug: there should be no signs of melting, creases or mechanical damage. If you use an extension cord, remove it and connect the device directly to the wall, since long cables often cannot withstand the starting currents of the motor. Electrical network Must be in good working order, otherwise no internal repairs will help.
⚠️ Attention: If you notice a burning smell or sparking in the socket area when trying switch on, immediately stop all manipulations and call an electrician. It is strictly prohibited to operate equipment with faulty wiring to avoid a fire.
Do not forget about banal defrosting if your refrigerator is not equipped with a No Frost system. An ice blockage in the evaporator can block the system, creating excess pressure that prevents starting. Leave the unit turned off for 10-12 hours with the doors open to make sure that the problem is not frozen condensation.
Malfunctions of the start-up relay
The most likely reason that the refrigerator clicksbut does not start lies in the start-up relay. This small black box, mounted on the side of the compressor, is responsible for supplying voltage to the motor windings at the moment of start. If the contacts inside the relay are burnt or stuck, the circuit closes and opens, emitting that same characteristic sound, but no current flows to the motor.
To check the relay, it must be carefully removed. It is usually held on by latches or screws and fits over the three terminals of the compressor. Shake the relay near your ear: if something rattles inside, it means the core is broken and the part needs to be replaced. Visually inspect the contacts for carbon deposits or oxidation - this is a clear sign that starting device has failed.
How to check the relay with a multimeter?
For accurate diagnostics, remove the relay cover. Ring the contacts in the “normally closed” position - the device should show zero. In an inverted position (imitation start), the circuit should open. If the contacts ring short in any position or do not ring at all, the relay is faulty.
Replacing this part is one of the simplest procedures in refrigerator repair. You will need a new relay that matches your compressor model (the markings are usually on the housing). Install the new part, pressing it tightly onto the contacts, and secure with the clamping bar. After that, turn on the device.
- 🔌 Symptoms: Click, silence, click again after a few seconds.
- 🔧 Tools: Screwdriver, pliers, multimeter (preferably).
- 💡 Advice: Buy a relay strictly of the same series as it was, since the current characteristics may differ.
Problems with the compressor and interturn short circuit
If replacing the relay did not help, and refrigerator still makes clicking noises, but does not start, the problem may be more serious - in the compressor itself. An interturn short circuit in the motor windings leads to the fact that the motor tries to start, consumes a huge current, and the thermal protection relay instantly opens the circuit. In this case, you hear a click, the motor may hum slightly or twitch, but a full start does not occur.
You can diagnose this malfunction by measuring the resistance of the windings using a multimeter. Remove the start relay and protective cover to gain access to the three compressor contacts. Measure the resistance between pairs of contacts: between the working and starting windings, between the working and common windings, between the starting and common windings. The sum of the two smaller resistances should be equal to the large resistance.
If the device shows infinity (open) or, conversely, a value close to zero (short circuit), compressor it is faulty. Also a sign of an interturn short circuit is the strong heating of the motor housing when trying to start and knocking out plugs in the apartment. In this case, DIY repair is impossible - the compressor needs to be replaced, which is a complex procedure that requires evacuation of the system and refilling with freon.
Sometimes the engine may be in good working order, but mechanically jammed. In this case, it hums, but the shaft does not turn. There is a method of “treating” a jammed compressor by applying increased voltage, but doing this at home extremely dangerous and is ineffective without special equipment.
Thermoregulator and temperature sensors
In refrigerators with electromechanical control for turning on and The thermostat is responsible for turning off the engine. If this element is faulty, it may not send a signal to start, or, conversely, constantly keep the circuit closed, which leads to overloads. However, if you hear clicks, this often means that the circuit is closing, but the protection relay (inside the thermostat or separately) does not allow the current to pass further.
You can check the thermostat by closing its contacts directly. Find the two wires going to the thermostat, disconnect them and connect them together (being careful!). If after this procedure the refrigerator starts up and starts freezing, then the problem is in thermal sensor, which needs to be replaced with a new one.
In modern models with electronic control, the function of the thermostat is performed by a temperature sensor connected to the control module. If the sensor “lies” and shows that it is already cold in the chamber, the motor will not turn on. In this case, error codes may appear on the display. Checking such sensors requires testing their resistance at different temperatures.
| Symptom | Probable cause | Action |
|---|---|---|
| Clicking, silence, cold in the chamber | The thermostat is faulty | Close the contacts or replace the sensor |
| Frequent clicks, the motor does not heat up | The starting relay is burnt out | Replace the relay |
| Clicking, humming, knocking out plugs | Short circuit in the compressor | Replacing the compressor |
| Clicks at large intervals | Low voltage in the network | Check the network, install a stabilizer |
Faults in wiring and contacts
Do not discount the condition of the electrical wiring inside the refrigerator. Over time, vibration and temperature changes can cause contacts to oxidize, and wire insulation can dry out and crack. Poor contact in the compressor power circuit leads to a voltage drop and inability to start, which is accompanied by characteristic clicking sounds.
Inspect the wiring harnesses going to the compressor and thermostat. If you see blackened areas, melted insulation or traces of corrosion on the terminals, these areas must be cleaned or replaced. Oxidation of contacts increases resistance, which is especially critical when starting the engine.
☑️ Checking the electrical part
Pay special attention compressor connection block. The contacts in it must be clean and fit tightly. If the pad has melted, it must be replaced, as further use will lead to heating and possible fire. Use only heat-resistant materials for insulation.
When you need to call a technician
Despite the desire to save money, there are situations when self-repair is impractical or dangerous. If the diagnostics showed a malfunction of the motor itself, you will need not only a new motor, but also the services of a professional to open the system, solder the tubes, vacuum and charge with refrigerant. It is impossible to do this efficiently without special equipment. compressor, you will need not only a new motor, but also the services of a professional to open the system, solder the pipes, evacuate and charge with refrigerant. It is impossible to do this efficiently without special equipment.
It is also worth contacting specialists if you are not confident in your skills in working with electricity. High voltage and complex electronic control modules require qualifications. If, after replacing the relay and checking the wiring, the refrigerator still does not work, the problem may lie in the “brains” of the device.
⚠️ Attention: Opening the refrigeration circuit (sawing the tubes) without subsequent professional soldering and refilling with freon will lead to complete and irreversible damage to the refrigerator. Do not break the tightness of the system unless you are planning complex repairs.
In addition, if your refrigerator is under warranty, any independent repair will deprive you of the right to free service. In this case, the only correct solution would be to contact an authorized service center.
Frequently asked questions (FAQ)
Why does the refrigerator click but does not turn on immediately after defrosting?
This may be due to the fact that there is a lot of moisture left in the system, which got into the electrical contacts, causing a short short circuit or corrosion. It is also possible that the thermostat has not yet reached the temperature to turn on if you turned on an empty, warm refrigerator. Let it stand turned off for a couple more hours to dry completely.
Is it possible to temporarily short-circuit the relay to make the refrigerator work?
It is strictly not recommended. The start relay performs an important motor protection function. Its exclusion from the circuit will result in the compressor operating without protection, which in 99% of cases ends in its combustion within a few minutes or hours. This temporary solution may cost you the purchase of a new refrigerator.
How much does it cost to replace the start relay?
The part itself is inexpensive, usually from 500 to 1500 rubles, depending on the model. However, if you call a specialist, you will also have to pay the cost of work and travel. Replacing it yourself saves money, but requires minimal technical skills.
The refrigerator clicks every 5-10 minutes, what's the matter?
This is the classic operation of a thermal protection relay. The motor tries to start, cannot, overheats, and the protection opens the circuit. After some time, when the relay cools down, the cycle repeats. This indicates a malfunction of the starting device, compressor or critically low voltage in the network.