The situation when The refrigerator clicks and does not freezecauses panic in any owner of household appliances. This is a classic symptom indicating that the compressor is trying to start, but is physically unable to crank the engine. The clicking sound you hear is the sound of the thermal protection relay or start relay, which turns on, sees the problem and opens the circuit to prevent the motor from burning out.
Often this process repeats cyclically: silence, loud click, hum for a couple of seconds, again click and disconnect. At this moment, the temperature inside the chamber is already beginning to rise, and the products are in danger of spoilage. Starting device cannot cope with the load, and the motor stalls before it has time to gain operating speed.
It is important to understand that ignoring this signal can lead to more serious and expensive repairs, including replacing the device itself compressor. If you notice that the unit makes characteristic sounds, but there is no cold, you must immediately carry out initial diagnostics. Further operation in this mode is dangerous for the electrical network and the unit itself.
The principle of operation of the start-up protection relay
To understand the essence of the problem, you need to understand the mechanics of the process. The main unit responsible for starting the engine is starting relay. It is this that supplies the impulse to the starting winding of the compressor. In good condition, this process takes a split second: the relay turns on, the motor starts, and the relay remains on while the refrigerator is running.
If the motor cannot start due to jamming or broken windings, the current in the circuit increases sharply. At this moment, thermal protection (bimetallic plate) comes into effect. It heats up from the increased current and opens the contacts, emitting that same loud click. Critical moment: if clicks are repeated every 10-20 seconds, this means that the thermal protection does not have time to cool down and reset, blocking restart.
In modern models such as Indesit or Atlant, posistor relays are often used, which are more sensitive to voltage surges. Older models with an electromagnetic operating principle are noisier, but sometimes more durable. The difference in design affects the nature of the sound: electromagnetic ones produce a louder and sharper click, while posistor ones can sound duller.
What is the danger of ignoring clicks?
Constant attempts to start when the compressor rotor is blocked lead to overheating of the windings. The insulation of the wires melts, which can cause a short circuit inside the case or even a fire in the wiring in the wall.
Main causes of the malfunction
There are several key factors why equipment behaves this way. Most often, the problem lies in the electrical part or mechanical jamming of the components. Diagnostics should be carried out sequentially, from simple to complex causes.
The first and most common reason is the failure of the starting relay itself. The contacts inside it could burn out, or the posistor could lose its properties. In this case, the relay simply cannot hold the circuit closed long enough to start the engine. Replacing this part usually solves the problem.
The second option is a malfunction of the compressor itself. If the piston group is jammed or there is an interturn short circuit in the windings, it will not be possible to start it using standard methods. The motor hums, but the shaft does not turn. It is also worth checking the thermostat: if it is “stuck” in the “on” position, the refrigerator will work without interruption until it burns out.
Diagnostics of the starting relay and thermostat
You should start checking with a visual inspection and testing the starting relay. To do this, you need to disconnect the unit from the network, remove the back cover at the bottom and dismantle the box with the relay. Carefully remove the part 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.
Next, you should check the thermostat. This element is responsible for turning the motor on and off when the desired temperature is reached. If its contacts are oxidized or welded, it may not send a signal to start or, conversely, may not break the circuit. To check, you can temporarily close the thermostat contacts with a wire: if the engine starts and starts to freeze, it means that the temperature controller is to blame.
When diagnosing, it is important to follow safety precautions. All manipulations with electrical components are carried out only with the device completely disconnected from the network. Using a multimeter will allow you to accurately determine the presence of resistance on the windings and the integrity of the circuits.
☑️ Algorithm for checking the relay
Mechanical wear of the compressor
If the electrical part is working properly, then the problem lies in the “heart” of the refrigerator - the compressor. Mechanical wear of the piston group leads to the fact that the engine cannot overcome the resistance and turn the shaft. At this moment, it emits a low-frequency hum, which ends abruptly with a click of the protection.
Often the cause of jamming is a lack of oil or its thickening. In older models that are more than 10-12 years old, the oil can turn into a resinous mass that blocks the movement of parts. In such cases, even a short-term start at high currents (the “wedging” method) gives only a temporary effect.
There is a technique for temporarily restoring the operation of a jammed compressor by applying increased voltage to the starting winding. However, this requires special skills and equipment. Without experience, you can completely finish off the unit or get an electric shock.
Comparative table of symptoms
For ease of diagnosis, we have compiled a table that will help compare symptoms with probable causes. Pay attention to the combination of sounds and indicator behavior.
| Symptom | Probable cause | Character of sound | Actions |
|---|---|---|---|
| One click when turned on | Faulty relay or wiring | Loud, single | Replacing the start relay |
| Cyclic clicks every 10 sec | Compressor jammed | Humming + click | Motor diagnostics, replacement |
| Quiet humming without clicks | Open windings or missing phase | Uniform hum | Check with a multimeter |
| Clicks and blinking of the light | Short circuit in the circuit | Crackling + click | Urgently disconnect from the network |
Consequences of ignoring the problem
You cannot leave a refrigerator running in emergency mode. Constant current surges when trying to start put a huge strain on the wiring in the house. This can lead to melting of the socket, cord, or even fire of electrical wiring in the wall.
In addition, the compressor itself heats up to critical temperatures during such “torture”. Even if it suddenly starts after a dozen attempts, its resource will be exhausted in a matter of days or hours. The oil in the system will lose its lubricating properties, which will lead to accelerated wear of the rubbing pairs.
⚠️ Attention: If you smell burning, plastic or see sparking in the compressor area, immediately unplug the cord from the outlet! Further operation is prohibited.
It is also worth considering that if the compressor is not working, the refrigerant circulation in the system may be disrupted. If there are microcracks in the system, when cooling and heating, air and moisture can be sucked into them, which in the future will require complex refilling and evacuation of the system.
When you need to call a specialist
Independent repair is only possible if you replace the start relay or thermostat, if you have basic electrical skills. However, if the problem lies in the compressor itself or the freon circulation system, you cannot do without professional intervention.
A master is needed if required replacement of the compressor. This process includes not only dismantling the old motor and installing a new one, but also soldering copper pipes, evacuating the system and charging with refrigerant. This requires specialized equipment: a vacuum pump, a pressure gauge station and scales.
Also, the help of a specialist is necessary when searching for freon leaks. If the refrigerator clicks but does not freeze, the refrigerant may have already leaked out and the compressor is running “idle”, trying to create pressure that there is nothing to create. In this case, a search for the leak, sealing and refilling are required.
⚠️ Attention: Work with refrigerant requires a license and special equipment. An independent attempt to refill can be dangerous to health and life.
Prevention and care of equipment
To extend the life of the refrigerator and avoid situations where it clicks and does not freeze, you must follow simple operating rules. First of all, keep the condenser (grid at the back) clean. Dust leads to overheating of the compressor, which increases the likelihood of it jamming.
Do not install the refrigerator close to the wall. For normal air circulation, a gap of at least 5-10 centimeters is required. Overheating is the main enemy of electric motors. Also avoid frequently turning the device on and off.
How to extend the life of the compressor?
Do not place hot foods in the chamber. This creates a sudden thermal load, forcing the engine to work at its limit, which accelerates wear of the oil and mechanical parts.
Check the door seal regularly. If the seal is worn out, warm air constantly enters the chamber, and the refrigerator operates almost non-stop. This also leads to overload and premature failure of the starting equipment.
Is it possible to repair a jammed compressor yourself?
Theoretically, there are methods of “wedging” by applying high voltage, but they are dangerous and give a temporary effect. At home, a full repair of the compressor (opening the housing, replacing valves) is impossible due to the need for hermetically sealed welding.
How much does it cost to replace the start relay?
The cost of the relay itself ranges from 800 to 2500 rubles, depending on the model of the refrigerator. The replacement work usually takes 15-20 minutes and is relatively inexpensive compared to replacing the compressor.
Why does the refrigerator click immediately after defrosting?
If you have just defrosted the refrigerator and it starts clicking, moisture may have gotten into the electrical relay contacts or wiring. Allow the appliance to dry completely for several hours before turning it on again.
Is it dangerous to leave the refrigerator on with these symptoms?
Yes, it is dangerous. Constant attempts to start can lead to overheating of the wiring, melting of the insulation and fire. In addition, you risk completely burning out the compressor, turning a simple repair into an expensive replacement of the unit.