The refrigerator clicks loudly: is it normal or a signal of a breakdown?

Have you noticed that your refrigerator has begun to periodically make loud clicks - sharp, distinct sounds that repeat at intervals from several minutes to an hour? This symptom can either indicate normal operation of the equipment or signal serious malfunctions. In 90% of cases, clicks are associated with starter relay, but sometimes they are caused by defects in the compressor, fan, or even unstable voltage in the network.

In this article we will analyze all possible causes - from harmless to critical, we will teach you to distinguish “normal” sounds from emergency ones, as well as We will give step-by-step instructions for diagnostics and repair. Atlant, Indesit, Samsung or Lji —the operating principles are the same for most models, but there are nuances that are important to know. If the clicks are accompanied by other symptoms (for example, the refrigerator does not freeze or often turns off), this is a reason to act immediately.

1. Normal clicks: when there is no need to worry

Not all sounds made by the refrigerator indicate a breakdown. Modern models are equipped with several systems that can make clicking noises during operation. Here three safe reasonsthat do not require intervention:

  • 🔄 Thermostat operation. When the temperature in the chamber reaches the set level, the thermostat opens the circuit - this is accompanied by a slight click. Normally, the sound is quiet and repeats every 30–60 minutes.
  • ❄️ Automatic defrosting (No Frost). In models with the system No Frost the heater is periodically turned on to defrost the ice - its relay may click when activated.
  • ⚡ Starting the compressor. When the engine is turned on, the starting relay is activated, which is sometimes accompanied by a single click. If after this the refrigerator begins to hum, this is normal operation.

How to distinguish a “normal” click from a problematic one? Pay attention to regularity and associated symptoms:

  • ✅ Safeif the clicks are rare (1-2 times per hour), the refrigerator freezes as usual, and there are no errors on the display.
  • ❌ Alarmingif the sounds are repeated every 5-10 minutes, the compressor does not start, or the temperature in the chamber has risen.
📊 How often does your refrigerator click?
Once every 30–60 minutes
Every 5–10 minutes
Continuously, without interruption
Only when turned on/off

2. Start-up relay: the main cause of clicks

In 70% of cases, loud clicks are associated with compressor start-up relay a small device that is responsible for starting the motor. The principle of its operation is simple: the relay supplies current to the compressor windings, and when the engine picks up speed, it turns off. If the relay contacts are burnt or the spring is weakened, it begins to “rattling”, emitting a series of clicks.

How to check the relay yourself:

  1. Unplug the refrigerator and carefully remove the back cover (in most models the relay is located next to the compressor and looks like a small box with wires).
  2. Disconnect the relay from the compressor and shake it - if you hear a knock inside or parts rattle, this is a sign of a malfunction.
  3. Ring the contacts with a multimeter in resistance testing mode. Between the terminals C (common) and NO (normal open) the resistance should be infinite, between C and NC (normal closed) - close to zero.

If the relay is faulty, you can replace it yourself - the part costs from 300 to 1500 rubles depending on the model. It is important to choose an analogue with the same parameters (rated current, voltage). Suitable relays for popular brands:

Refrigerator brand Relay model (analogs) Approximate price, ₽
Atlant, Biryusa RTK-1, RTP-1, Danfoss 103N0012 400–800
Indesit, Ariston Sensys PTC, ELR 1A 600–1200
Samsung, Lji RLS-8, RLS-12, Start Capacitor Kit 900–1500

☑️ Diagnostics of the start-up protection relay

Done: 0 / 5

Critical moment: if the relay clicks, but the compressor does not start, this can lead to overheating of the motor windings and its failure. In this case, the refrigerator must be turned off immediately and not used until repaired.

3. Problems with the compressor: when clicks are dangerous

If the start-up relay is working properly, but clicks are accompanied by lack of cold or overheating of the housing, the problem may lie in the compressor itself. Common malfunctions:

  • 🔥 Interturn short circuit in the windings. The compressor tries to start, but the relay immediately turns it off due to overload - frequent clicks are heard (every 5-10 seconds).
  • 🛠️ Piston jammed. If the motor cannot turn over, the relay repeatedly tries to start it, making a series of clicks.
  • ⚡ Insufficient voltage. When the network voltage is low (below 190 V), the compressor cannot start normally, which leads to cyclic clicks.

How to diagnose a compressor:

  1. Turn off the refrigerator and touch the compressor housing - if it is hot (more than 60°C), this is a sign of overheating.
  2. Test the windings with a multimeter:
    • The resistance between the terminals C (common) and S (start) should be 2-3 times higher than between C and R (run).
    • If the resistance is zero or infinity, the winding is burned out.

Repairing the compressor at home is almost impossible - special equipment is required for vacuuming and charging with freon. In most cases, it is easier and cheaper to replace the motor (the cost of a new compressor is from 5,000 to 15,000 rubles).

4. Malfunctions of the fan and the No Frost system

In refrigerators with the system No Frost clicks may come from the fan or heating element. Common reasons:

  • 🌀 Ice crust on the fan blades. If the fan touches ice, it may make a clicking or grinding noise as it rotates. Check the freezer - if there is a thick layer of ice on the back wall, defrosting is required.
  • 🔥 Faulty defrost heater. In systems No Frost the heating element is turned on by a timer. If its relay is faulty, it will click, but heating will not occur - as a result, the ice does not melt and the fan is blocked.
  • 🛠️ Wear of fan bearings. Over time, the bearings become loose, and the blades begin to cling to the housing, making clicks.

How to fix the problem:

  1. Defrost the refrigerator for 12-24 hours, after removing all food. After defrosting, check to see if the clicking noises have disappeared.
  2. If the sounds remain, remove the back panel of the freezer and inspect the fan. Make sure the blades rotate freely and do not touch the ice or hull.
  3. Test the heating element with a multimeter - the resistance should be in the range of 20–50 Ohms. If the device shows a break, the part must be replaced.
What to do if the clicks return after defrosting?

If the problem recurs, this may indicate a malfunction of the defrost sensor or timer. In this case, diagnostics are required at a service center, since independent replacement of these parts requires knowledge of the refrigerator circuit.

5. Power supply problems: power surges and unstable network

Clicking noises in the refrigerator can be caused by external factors - unstable voltage in the network or poor contact in the socket. Signs of electrical problems:

  • ⚡ Clicking sounds coincide with the blinking of the lights in the house.
  • 🔌 The refrigerator turns off spontaneously and then starts again.
  • 📉 A power-related error appears on the display (if any) (for example, E1 or PF y Samsung).

How to check and fix:

  1. Connect the refrigerator to another outlet - if the clicks disappear, the problem is in the old outlet (the contacts may have burned out).
  2. Use voltage stabilizer this will protect the refrigerator from surges. For most models, a stabilizer with a capacity of 1-2 kW is suitable.
  3. Check the voltage in the network with a multimeter. The normal range is 220 V ± 10%. If the voltage is below 190 V. or above 250 V, contact the management company.

If there are frequent voltage surges in your area, consider installing voltage control relay (for example, Zubr R116y or DS Electronics UZM-51MDIt will automatically turn off the refrigerator during critical surges, preventing damage). compressor.

6. Other possible causes of clicks

More often, clicks may be associated with less obvious malfunctions. their details:

  • 🧊 Thermostat (thermostat). If the thermostat contacts are burnt, it may make clicks when activated. Check it by turning the thermostat knob to maximum - you should hear a distinct click. If there is no sound, the part is faulty.
  • 🔋 The capacitor. In some models, it is not the relay that makes the clicking noise, but the capacitor (the container next to the compressor). If it is swollen or leaking, it needs to be replaced.
  • 🛡️ Overload protective relay. In refrigerators with inverter compressors (Lji, Samsung), the overheating protection may trigger, making clicking noises. is accompanied by an error on the display (for example, Er FF).

If you cannot independently determine the source of the clicks, use the exclusion method:

  1. Disable refrigerator from the mains and listen - if the clicks continue, the problem is mechanical (for example, the fan or ice).
  2. If the sounds disappear, turn on the refrigerator and touch the compressor. Vibration and clicks from the bottom? Most likely, the relay or the motor itself is to blame.

7. When to call a technician: 5 alarming symptoms. data-i="188">Some situations require professional intervention. Contact the service center if:

Some situations require professional intervention. Contact the service center if:

⚠️ Attention: If the refrigerator clicks, but does not turn on for more than 12 hours, and the temperature in the chamber begins to rise, move perishable goods to a cool place (for example, on the balcony in winter) and call a technician within 24 hours.
  • 🔥 The compressor is overheating (the housing is hot, a burning smell is heard).
  • ❄️ The refrigerator does not freeze, but the light inside is on.
  • ⚡ Clicking sounds are accompanied by sparking or smoke from the rear panel.
  • 📉 The display shows an error that cannot be reset (E5, Er DS etc.).
  • 🛠️ After self-diagnosis, a compressor malfunction or freon leak was revealed.

The cost of repairs depends on breakdowns:

Type of fault Average repair cost, ₽
Replacement of the start-up relay 1500–3000
Repair/replacement of the compressor 6000–15000
Elimination of freon leakage + refueling 4000–8000
Replacing a fan or heater No Frost 2500–5000

When choosing a service center, pay attention to:

  • 📄 Availability of a license for repair of refrigeration equipment.
  • ⚙️ Warranty for work (at least 6 months).
  • 📞 Reviews about the speed of departure (ideally on the day of contact).

FAQ: Frequently asked questions about clicks in the refrigerator

My refrigerator Atlant clicks every 5 minutes, but it works fine. dangerous?

If the refrigerator is freezing, and clicks are not accompanied by other symptoms (overheating, shutdowns), most likely this is the normal operation of the thermostat or relay. However, frequent clicks (more than once every 30 minutes) may indicate wear of the start-up relayWe recommend monitoring the situation at the first time. signs of deterioration in performance (for example, insufficient cooling), replace the relay.

After defrosting, the refrigerator Samsung No. Frost began to click and does not freeze What should I do?

Most likely, the problem is in the defrosting system: the heating element, sensor or timer may have failed. Try defrosting the refrigerator again for 24 hours, then turn it on. If clicks and lack of cold persist, the faulty unit (usually the heater or sensor) needs to be replaced. This is a common breakdown, and it is better to fix it in the service. Samsung With No Frost This is a common breakdown, and it is better to fix it in the service.

The refrigerator Indesit clicks and immediately turns off. What is the reason?

These are the symptoms for two faults:

  1. Faulty start-up relay —cannot keep the contacts closed, and the compressor turns off.
  2. Interturn short circuit in the compressor —the relay “sees” the overload and opens the circuit. In this case, the compressor will be hot. touch.

Try to replace the relay (costs ~500 ₽). If this does not help, you will need diagnostics of the compressor.

Is it possible to replace the relay in the refrigerator yourself Lji?

Yes, replacing the start-up relay is one of the simplest procedures. You will need:

  1. Disconnect the refrigerator and remove the back cover.
  2. Take a photo of the wiring diagram for the relay.
  3. Disconnect old relay and install a new one (for example, RLS-8 for Lji).
  4. Connect the wires according to the diagram and check the operation.

The main thing is not to mix up the wires and make sure that the new relay matches the parameters (the rated current should coincide).

The clicking sound in the refrigerator increases at night. Why?

This may be due to two factors:

  1. Voltage drop in network at night (for example, due to neighbors turning on the heaters.
  2. Increased load on the compressor due to warmer air in the kitchen (if the air conditioner runs during the day and turns off at night).

Solution: install a voltage stabilizer and make sure that the refrigerator is in a cool place (not next to the stove or battery).

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