The situation when a household item refrigerator begins to behave uncharacteristically always causes concern for the owner. Extraneous sounds, such as frequent clicks and changes in engine operating mode, are especially frightening. If you notice that the unit begins to turn on and off too often, this is a sure sign that the system cooling is not working properly. Ignoring such symptoms can lead to complete breakdown of expensive equipment and spoilage of products.
In this article we will look in detail at why compressor it makes clicking sounds and what to do if the operating cycle is disrupted. You will find out which structural elements fail most often and whether you can fix the problem yourself. Understanding the nature of sound is the first step to a successful repair or competent call to a repairman.
Operating principle and normal compressor sounds
To understand when to sound the alarm, you need distinguish between normal operating noises and signs malfunctions. In standard operating mode refrigeration unit it emits a hum, which can intensify or subside depending on the phase of the cycle. However, dry, ringing clicks, especially those repeated at short intervals, are not the norm. Usually they indicate an attempt to start the engine, which for some reason cannot start.
The normal operating cycle looks like this: the compressor turns on, cools the chambers to the set temperature, followed by a long break. If you hear a series of clicks, followed by a hum that lasts only a few seconds, and then another click and silence, this is a so-called “idle start.” At this moment start relay tries to start the motor, but the protection is triggered, interrupting the supply of electricity. This behavior is dangerous due to overheating of the windings.
Faults in the starting relay and thermostat
The most common reason that the refrigerator clicks does not start is the failure of the starting relay. This small element is responsible for supplying a starting pulse to the motor winding and protecting against overloads. When the relay wears out or burns out, the contacts inside it begin to spark and make a characteristic sound, but they can no longer close the circuit to fully start the engine. As a result, you hear a dry crackling sound, but the compressor is silent or hums for a couple of seconds.
The second common reason is a malfunction of thermostat (thermostat). If this sensor transmits incorrect signals about the temperature inside the chambers, the compressor may turn on too often or, conversely, not start at all. Sometimes the thermostat simply “sticks” in the “on” position, forcing the motor to work without interruption, which leads to its overheating and subsequent emergency shutdown with a click. Checking these components requires multimeter basic electrical knowledge.
⚠️ Attention: Before any manipulations with electrical components, be sure to unplug the refrigerator. Even after switching off, residual voltage may remain in the capacitors.
How to check the relay yourself?
To check the relay, you need to remove it and gently shake it. If a ringing sound is heard inside (as if from a loose nut), it means that the mechanical part is damaged and the relay must be replaced. You can also test the contacts with a multimeter.
Problems with the compressor and interturn short circuit
The most serious and expensive scenario is a breakdown of the compressor itself compressor. If the motor hums but does not start and then hears a shut-off click, this may indicate a turn-to-turn short in the windings. In this state, the motor consumes a huge current, which instantly heats it up and causes the thermal protection relay to trip. It is absolutely forbidden to continue operating the refrigerator in this condition - this can lead to a fire in the wiring.
Another reason for a “difficult” start is mechanical wear of the piston group or jamming of the shaft. In this case, the engine tries to turn over, emits a powerful roar, but physically cannot budge. After a few seconds, a click is heard and the motor stops. Diagnostics The compressor often requires replacing the starting relay with a known good one: if the situation does not change with the new relay, the problem lies inside the “heart” of the refrigerator.
- 🔊 Loud click and silence - most likely, the starting relay has burned out relay.
- 🔊 Humming for 5-10 seconds and a click - possible inter-turn short circuit or jamming.
- 🔊 Frequent switching on without clicks - a problem with the tightness of the circuit or thermostat.
- 🔊 Quiet crackling inside the chamber - the plastic may crack due to temperature changes (this is normal).
The influence of voltage changes and wiring
Unstable power supply is the scourge of many residential buildings. If voltage the network falls below the permissible minimum (usually 190-200 Volts), the compressor physically cannot start, but it makes an attempt. As a result, you hear clicking and humming noises. Constant operation in such conditions kills the engine. The solution to the problem may be to install a voltage stabilizer, which will equalize the current parameters before supplying it to the refrigerator.
It is also worth checking the condition of the socket and plug. Loose contacts, oxidation or burning of the wiring at the connection point can cause sparking, which is heard as clicking sounds. If the plug becomes hot or shows signs of soot, it must be replaced. Poor contact creates resistance that prevents the normal start of a powerful electric motor.
Diagnostics: table of symptoms and solutions
To simplify the initial diagnosis, we will create a summary table that will help you navigate the nature of the malfunction. Remember that an accurate diagnosis can only be made by a qualified technician with the appropriate equipment.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Click, buzzing for 3-5 seconds, silence | Malfunction of the starting relay | Low | Replacement of the relay |
| Frequent switching on, no cold | Leakage freon | High | Searching for leaks, refilling |
| Powerful hum, strong heating | Compressor jamming | High | Replacing the compressor |
| Clicks without starting, there is cold | Thermostat malfunction | Medium | Replacing the sensor |
| Crackling inside cameras | Expansion of plastic/ice | Not required | Observation |
☑️ Primary inspection checklist
When you need to call a technician
There are a number of situations when self-repair is not only useless, but also dangerous. If you have replaced the start relay and thermostat and the refrigerator t continues to click and not turn on, the problem lies deeper. Opening a sealed circuit, checking freon pressure and replacing the compressor require special tools: a vacuum pump, a pressure gauge station and a burner.
In addition, modern models are equipped with sophisticated electronics. If the clicking sounds come from the control module and not from the mechanical relay, the board will need to be re-flashed or replaced. Attempts to “treat” electronics by soldering at home often lead to permanent failure of the device. In such cases, saving on calling a specialist will result in the purchase of a new refrigerator.
⚠️ Attention: If you smell burning or see sparks in the compressor area, immediately unplug the appliance and do not try to turn it on again until the technician arrives.
Prevention and proper care
To extend the life of the compressor and avoid frequent breakdowns, it is important to follow the operating rules. Do not put hot food in the refrigerator, as this causes the motor to work harder trying to reduce the temperature. Defrost the unit regularly (if it is not a No Frost system) so that the layer of ice does not interfere with heat transfer. Also keep the condenser on the back wall clean - dust and animal hair impair cooling, causing the engine to run longer and more often.
Ensure proper ventilation. The refrigerator should not stand close to the wall; it needs a gap for air circulation. If the motor overheats due to lack of ventilation, the thermal relay will constantly turn it off, which you will hear as characteristic clicks. Following these simple rules will allow the equipment to serve for many years without serious malfunctions.
Why does the refrigerator click but does not freeze?
If you hear clicks, but it is warm inside, this means that the compressor does not start fully. Most often, the cause is a burnt-out start relay or a broken motor winding. Less often - in a refrigerant leak, when the sensors do not allow the engine to start due to low pressure.
Is it possible to use a refrigerator if it clicks frequently?
For a short time - it is possible, but not recommended. Constantly trying to start wears out the engine and can lead to complete combustion. It is better to turn off the device and carry out diagnostics so that you do not have to change the entire compressor unit.
How much does it cost to replace the start relay?
The part itself is inexpensive, usually in the range of 500-1500 rubles depending on the model. However, the cost of the master’s work will include diagnostics and travel. Self-replacement is possible if you know how to use a screwdriver and a multimeter.
Is it dangerous if the clicks are accompanied by a smell?
Yes, it is dangerous. The smell of burning or burning plastic indicates overheating of the wiring, melting of the insulation or burning of the windings. In this case, operation is strictly prohibited in order to avoid a fire.