Have you noticed that your refrigerator periodically makes clicking noises from the back wall? This sound can range from a barely noticeable tapping sound to loud, sharp clicking sounds that can be heard even in the next room. Before you panic and call a technician, it is important to understand: in most cases, such sounds are part of the normal operation of the equipment. But sometimes they signal an imminent breakdown.
Modern refrigerators (especially models with system No Frost or inverter compressors) are equipped with many mechanical and electronic components that can make clicking noises. In this article, we will analyze all possible causes - from harmless to those requiring intervention, and also give clear instructions on how to diagnose the problem yourself. You will know when you can sleep peacefully and when it’s time to prepare a budget for repairs.
Let us note right away: if the clicks are accompanied by other symptoms (for example, the refrigerator does not cool, the indicators are blinking or frost appears), this is a reason for a more detailed check. Single rare clicks usually do not pose a threat, but regular loud sounds are a reason to understand their nature.
1. Normal clicking noises: when you shouldn't worry
Many users get scared when they hear clicking noises coming from the back of the refrigerator, although in fact this is standard behavior for most models. Let's look at the most common "safe" reasons:
- 🔄 Compressor start relay. Every time the compressor is turned on or off, the start relay is activated - this is accompanied by a characteristic click. In refrigerators with inverter compressors (Samsung RB30A3**, LG GA-B429), such sounds may be more frequent due to smooth power control.
- ❄️ Operation of the defrosting system. In models with No Frost (for example, Bosch KAN58A55, Indesit DF 4180), the heater is periodically turned on to remove frost - its activation is also accompanied by a click of the thermostat.
- 🔌 Thermostat. Mechanical thermostats (installed in Atlant XM-4021, Biryusa 10) click when contacts are closed/opened to adjust the temperature.
How to distinguish normal clicks from problematic ones? Pay attention to their regularity and volume:
- ✅ Normal: clicks are rare (1-2 times per hour), quiet, not accompanied by other noises (hum, grinding).
- ❌ Problem: clicks are frequent (every 5–10 minutes), loud, accompanied by vibration, or the refrigerator does not freeze well.
If your refrigerator falls into the first category, you can exhale - no action is required. But if the clicks become more frequent or louder, read on.
2. Clicks due to a faulty compressor relay
The start relay is one of the most vulnerable elements of the refrigerator. Its task is to supply current to the compressor when it is turned on. If the relay fails, it can:
- 🔊 Click repeatedly in a row (the compressor tries to start, but cannot).
- 🔥 Overheat (sometimes it even smells like burning).
- 🚫 Completely block the operation of the compressor (the refrigerator does not cools).
How to check the relay yourself:
- Unplug the refrigerator and carefully remove the back cover (in most models it is secured with latches or screws).
- Find the relay - this is a small box attached to the compressor (usually black or gray).
- Remove the relay and shake it. If you hear knocking or rattling inside, this is a sign of a breakdown.
- Check the contacts for melting or black spots.
Disconnect the refrigerator from the mains
Remove the back cover
Find the relay on the compressor
Check the integrity of the case and contacts
Shake the relay - there should be no extraneous sounds inside-->
If the relay is faulty, it needs to be replaced. The cost of a new part is from 500 to 2000 rubles, depending on the model of the refrigerator. You can do the replacement yourself, but if you are not confident in your skills, it is better to call a specialist.
⚠️ Attention: Do not try to start a refrigerator with a faulty relay - this can lead to burnout of the compressor winding, and replacing it will cost 8-15 thousand rubles.
3. Problems with the thermostat: why does it click too often
The thermostat (or thermostat) is responsible for maintaining the set temperature in the refrigerator compartment. In mechanical models (Atlant, Stinol, Nord), it makes a click when triggered. But if the clicks become too frequent, this may indicate:
- 🌡️ Incorrect temperature setting (the regulator is set to maximum, and the thermostat operates more often).
- 🔧 Wear contacts (over time they burn out, and the thermostat begins to “rattling”).
- 🧊 Refrigerant leak (if the refrigerator does not freeze well and the thermostat clicks without stopping).
How to check the thermostat:
- Turn the thermostat knob to the minimum value (usually position "1" or "Min").
- If the clicking stops, the problem is that the temperature is too low - return the regulator to position "2-3".
- If the clicking continues, turn off the refrigerator and remove the thermostat cover (it is located inside the chamber, usually on the right).
- Check the wires for melting or oxidation.
If the thermostat clicks, but the refrigerator does not turn on, it must be replaced. The cost of a new thermostat is from 800 to 3000 rubles. In some models (for example, Indesit BIAA 13), the thermostat is combined with an adjustment knob, and the entire unit will have to be replaced.
4. Malfunctions in the No Frost system: why the fan and timer click
Refrigerators with the system No Frost (Samsung RL38, LG GB-B459, Bosch KGE39**) have additional elements that can make clicks:
- ⏱️ Defrost timer — turns on the heater to remove frost. Its operation is accompanied by a click.
- 🌀 Fan —if it touches ice or foreign objects, this may cause knocking.
- 🔥 Evaporator heater —when turned on/off, it makes a click through the thermal relay.
How to diagnose the problem:
| Symptom | Probable cause | What to do |
|---|---|---|
| Clicks every 8-12 hours, the refrigerator is working normally | The defrost timer is triggered (normal) | Do nothing |
| Clicks every 5-10 minutes, there is a lot of ice in the freezer | The heater or defrost sensor is faulty | Check the heater with a multimeter, replace if necessary |
| Clicks + fan noise, the refrigerator does not freeze well | Ice blocks the fan blades | Defreeze refrigerator for 12–24 hours |
| Clicks + the "Alarm" or "Defrost" indicator is flashing | No Frost system failure | Reboot the refrigerator (turn it off for 10 minutes), if that doesn’t help, call a technician |
If ice appears in the freezer in the refrigerator, and the clicks are accompanied by the hum of the fan, try complete defrosting: No Frost Ice appears in the freezer, and the clicking noise is accompanied by the hum of the fan, try complete defrosting:
- Unplug the refrigerator.
- Remove all products and shelves.
- Leave the doors open for 12-24 hours (the ice should completely melt).
- Wipe the internal surfaces with a dry cloth.
- Turn on the refrigerator and check if the clicking noises have disappeared.
⚠️ Attention: Do not try to speed up defrosting with a hairdryer or hot water - this may cause damage plastic parts and seals.
5. Clicking sounds due to problems with the compressor: when urgent help is needed
If clicking sounds are accompanied by the following symptoms, this may indicate a compressor malfunction:
- 🔇 The refrigerator does not turn on at all (no compressor hum).
- 🔥 The relay clicks repeatedly in a row, then silence.
- 💥 You can hear the smell of burning or see melted wires.
- 🌡️ The temperature in the chambers rises, despite the fact that the compressor is trying to start.
A critical sign of a compressor breakdown is when the relay clicks 3-5 times in a row with at intervals of 1–2 seconds, and then the refrigerator is silent for 5–10 minutes, after which the cycle repeats. This indicates an interturn short circuit or a break in the winding.
What to do in this case:
- Disconnect the refrigerator from the network and do not turn it on until repaired.
- Check whether the indicators on the control panel are lit. If yes, the problem may be in the control board.
- Call a technician for diagnostics. The compressor cannot be repaired - it can only be replaced.
The cost of a new compressor is from 5,000 to 15,000 rubles (depending on the model), plus the work of a master (2,000–4,000 rubles). In some cases, it is cheaper to buy a new refrigerator, especially if yours is more than 10 years old.
How to check a compressor with a multimeter?
To diagnose a compressor, you will need a multimeter. Turn off the refrigerator, remove the relay and check the resistance between the compressor contacts:
- Between C (common) and S (starting) — there should be ~20–40 Ohms.
- Between C and R (working) — ~10–20 Ohm.
- Between S and R —the sum of the two previous values (~30–60 Ohms).
If the resistance is 0 or infinity, the compressor is faulty.
6. Other causes of clicks: from the fan to the control board
Sometimes clicks do not come from the main components, but from auxiliary elements. Let's consider less obvious reasons:
- 🌀 Fan (in models with No Frost). If it hits ice or wires, it causes a knocking sound. The solution is defrosting or adjusting the position of the fan.
- 🔌 Control board (in refrigerators with electronic control, for example, Samsung RB37, LG GA-B489). Relays on the board may click when switching modes. If the clicks are accompanied by malfunctions (indicators blink, settings are lost), the board needs to be diagnosed.
- 🧲 Magnetic valve (in two-compressor refrigerators). It switches the flow of refrigerant between chambers and may click when activated.
- 🔋 New type start-up protection relay (installed in some models Atlant and Biryusa). It clicks louder than usual, but this is not a breakdown.
If you suspect a problem with the control board, do not try to repair it yourself - this is a complex electronic device, which requires professional diagnosis. The cost of board repair is from 2000 to 6000 rubles.
7. When to contact a technician: checklist for making a decision
To understand whether a specialist’s help is needed, answer the following questions:
Clicks are accompanied by a lack of cooling
The relay clicks repeatedly in a row (3+ times)
A burning smell is heard or visible melted parts
The refrigerator turns off a few seconds after starting
Errors appear on the display (for example, E1, F2, dH)-->
If you answered “yes” to at least one of the points, do not delay calling the technician. The longer you operate a faulty refrigerator, the higher the risk of a more serious breakdown.
When calling a technician, check:
- Refrigerator model (located on the sticker inside the chamber or on the back).
- Frequency and nature of clicks (frequent, rare, whether accompanied by other sounds).
- Additional symptoms (does not freeze, lights blink etc.).
The average cost of diagnostics is 500–1500 rubles. If the technician discovers a breakdown, he will immediately quote the cost of repair. In most cases, repairs at home take 1–2 hours.
⚠️ Attention: If the refrigerator is under warranty, do not disassemble it yourself - this will void the warranty. Contact the service center. brand.
8. Prevention: how to reduce clicks and extend the life of the refrigerator
To minimize the number of clicks and prevent breakdowns, follow these recommendations:
- 🧊 Defrost the refrigerator regularly (even if it has data-i="209">). Once every 6-12 months is enough. No Frost). Once every 6–12 months is enough.
- 🌡️ Do not set the thermostat to maximum —the optimal value is "2" or "3".
- 🔌 Check the voltage in the networkPower surges can cause damage. relay and control board. If necessary, use a stabilizer.
- 🧹 Clean the back wall of dust 1-2 times a year. Dust worsens heat transfer and makes the compressor work harder.
- 🚪 Do not slam the door - this may cause the thermostat to malfunction.
If your refrigerator is older than 7-10 years, consider buying a new one. Modern models (for example, Samsung RS5000 or LG Instaview) are quieter and more economical.
FAQ: Frequently asked questions about clicks in the refrigerator
Why does a new refrigerator click more often than an old one?
Modern refrigerators with inverter compressors and systems No Frost have more electronic components that can click when switching modes. This is normal if the clicking is not accompanied by other problems.
Is it possible to replace the compressor relay yourself?
Yes, if you have have basic skills in working with equipment. The relay is attached to the compressor with latches or screws, and the wires are connected through connectors. The main thing is to disconnect the refrigerator from the network and not mix up the wires when connecting a new relay.
The clicks in the refrigerator became louder after moving. What should I do?
Perhaps internal parts have shifted during transportation (for example, tubes or compressor mounts). Check if they are touching the back wall. The relay could also be damaged - in this case, it needs to be replaced.
The refrigerator clicks and does not turn on. What could this be?
Most likely, the compressor relay or the compressor itself is faulty. Also check if the fuse on the control board has blown. control).
Is it necessary to defrost a No Frost refrigerator if it clicks?
Yes, even refrigerators with No Frost need periodic defrosting (once every 6-12 months). This helps remove frost, which can block the fan and cause extraneous sounds.