The refrigerator is one of the most energy-intensive appliances in the house, and its internal components operate under constant load. If you heard an uncharacteristic crackling sound, smelled something burning, or noticed that the unit stopped freezing, there is a high probability that something burned out. But which parts are the most vulnerable? And is it possible to prevent their failure?
In this article we will analyze in detail 7 key components of the refrigeratorwhich most often suffer from overheating, power surges or natural wear and tear. You will learn how to recognize a breakdown at an early stage, why it happens (spoiler: it’s not always the manufacturer’s fault!) and what to do to avoid costly repairs. And also - which models of refrigerators are especially susceptible to “ignition” of electronic components due to design features.
Important: if you have already encountered a problem, do not panic. Most breakdowns can be repaired, and some parts (for example, the starting relay) can be replaced yourself. But first you need to accurately identify the culprit.
1. Compressor: the “heart” of the refrigerator, which can burn out from overload.
The compressor is main working body the refrigerator, which is responsible for circulating the refrigerant. It works in the “on/off” mode hundreds of times a day, and each start is a micro-stress for the motor windings. If the compressor overheats, its insulation is destroyed, which leads to interturn short circuit or winding breakage.
How to understand that the compressor has burned out?
- 🔊 Refrigerator does not turn on at all (no characteristic buzz when starting).
- ⚡ When you try to turn it on, it triggers automatic device in the dashboard or knocks out the RCD.
- 🌡️ The temperature in the chambers is rising rapidly, although the light inside is on.
- 💨 Compressor housing (black “barrel” at the back) scalding hot even after shutdown.
Why does this happen?
- ⚡ Power surges on the network is the most common reason. Compressors of modern refrigerators (Samsung RL-series, LG Inverter Linear) are sensitive to changes above 240V.
- 🔥 Clogged capillary tube or freon leak causes the compressor to work without stopping, which leads to overheating.
- 🕒 Natural wear after 10–15 years of operation (especially in models without overload protection, for example, Atlant XM-4021).
⚠️ Attention: If the compressor burns out due to an interturn short circuit, it cannot be repaired - only replacement! Attempts to rewind the winding at home will lead to repeated failure within 1–2 months.
2. Starting relay: a small part that often fails
The starting (or start-protective) relay is "assistant" compressorthat supplies current to the winding at the time of starting. It protects the motor from overloads, but it itself often suffers from:
- 🔌 Frequent on/off (for example, if the thermostat is incorrectly set).
- 💥 Short circuit in the compressor windings (the relay “takes the blow”).
- 🕯️ Overheating due to poor ventilation of the rear wall of the refrigerator.
Signs of a relay malfunction:
- 🔄 Refrigerator clicks, but does not start (repeated clicks are heard at intervals of 5-10 seconds).
- 💡 The light inside is on, but the motor does not hum.
- 🔥 The relay emits the smell of burning plastic.
How to check the relay yourself?
- Disconnect the refrigerator from the mains and remove the relay (usually it is attached to the compressor).
- Shake the part - if you hear it knock or rattling, this is a sign of core destruction.
- Test the contacts with a multimeter: the resistance between the terminals should be
20–40 Ohm.
3. Thermostat (thermostat): why it burns out and how it manifests itself
The thermostat is the “brain” of the refrigeratorwhich controls the temperature and sends signals to turn the compressor on/off In mechanical models. (for example, Biryusa 130) is a capillary tube with gas, in electronic (Samsung RB37J5240) - a sensor with a board. Both systems can fail.
Causes of thermostat burnout:
| Thermostat type | Cause of failure | Symptoms |
|---|---|---|
| Mechanical | Oxidation of contacts, leakage gas from the capillary tube | The refrigerator works without stopping or does not turn on at all |
| Electronic | Power surge, moisture on the board | The display shows an error (for example, E1 or F2), the compressor does not respond to commands |
| Common for both | Incorrect installation (door distortions, warm air entering) | Inconsistency of temperature in the chambers with the set one settings |
How to check the thermostat?
- 🔧 In mechanical models: turn the thermostat knob to maximum. If the compressor does not turn on, the part is faulty.
- 📱 In electronic ones: reset the settings to factory settings (
Settings → ResetIf the error remains). - the board needs to be repaired.
⚠️ Attention: In refrigerators with a system No Frost (for example, Bosch KGE39XW20R) a faulty thermostat can lead to icing of the evaporator and damage to the fan!
4. Control board: the most expensive breakdown in modern refrigerators
Electronic control boards are vulnerable to voltage surges, humidity and overheating In models with a display (LG GA-B489YDQZ, Samsung RF23J9011), the board is responsible for everything. functions: from temperature adjustment to control SmartThinQ. Its replacement can cost up to 50% of the price of a new refrigerator.
Signs of a burnt board:
- 📛 Display does not turn on or shows hieroglyphs.
- 🔄 Refrigerator reboots on its own (turns off and on cyclically).
- 🔊 It beeps non-stop, although the door is closed.
- 💡 The light inside does not respond to the opening of the door.
What causes the breakdown?
- ⚡ Pulse voltage surges (even if you use a surge protector!).
- 💦 Condensation on the board due to improper installation of the refrigerator (for example, close to the wall).
- 🕷️ Short circuit due to dust or insects.
Use a voltage stabilizer (not a surge protector!)
Check the door seal for leaks
Do not place the refrigerator next to it with a stove or battery
Regularly clean the back wall of dust-->
5. No Frost fan: why it stops spinning and what to do
In refrigerators with a system No Frost (Samsung RB30J3000, Liebherr CNef 4315) the fan is responsible for air circulation. If it stops working, ice forms in the chamber, and the compressor starts working non-stop, trying to compensate for the lack of cooling.
Causes of fan failure:
- 🧊 Icing of the blades due to a faulty defrost heater.
- 🔌 Bearing wear (fan hums, but does not rotate).
- 🔥 Motor winding burnout (most often due to power surges).
How to diagnose?
- Disconnect the refrigerator and defrost it for 12 hours.
- After turning it on, listen: if the fan does not start for 5-10 minutes, check it with a multimeter.
- The winding resistance should be
100–300 Ohm. If the device shows0(short circuit) or∞(open circuit), the fan needs to be replaced.
What happens if you ignore a faulty fan?
Without air circulation in the chamber No Frost “snow caps” are formed on the back wall. The compressor will wear out, which will lead to its overheating and failure within 1–3 months. In addition, food will spoil faster due to uneven cooling.
6. Defrost heater: a hidden threat to No Frost systems
The heating element (heating element) in the system No Frost is responsible for ice defrosting on the evaporator. If it burns out, the refrigerator begins to become “overgrown” with snow, and the fan is blocked by ice. Most often this happens in models Samsung, LG i Beko after 5–7 years of operation.
Symptoms of malfunction:
- ❄️ On the back wall of the freezer a thick layer of ice is formed (more than 1–2 cm).
- 🔄 The refrigerator turns on more often works longer.
- 💧 After defrosting, the water does not flow into the drainageaccumulates at the bottom.
How to check the heating element?
- Turn off the refrigerator and remove the back panel of the freezer cameras.
- Find the heating element (thin tube or spiral under the evaporator).
- Test it with a multimeter: the resistance should be
20–60 Ohm.
⚠️ Attention: If the heating element burns out due to a short circuit, before check by replacing defrost fuse (often it also fails and requires replacement). In models Indesit i Ariston this fuse is located next to the heating element and looks like a small glass flask.
7. Lighting lamp: when replacing it will save you from serious problems
It seems that the light bulb in the refrigerator is a trifle, but its malfunction may indicate more serious problems:
- 💡 If the lamp does not light up when opening the door, check door switch (contacts often oxidize).
- 🔌 If the lamp flashes or dim light, this may indicate voltage problems c network.
- 🔥 If it comes from the lamp burning smell, immediately turn off the refrigerator - this is a sign of a short circuit in the lighting circuit!
Modern models (Samsung Family Hub, LG InstaView) use LED lamps, which rarely burn out. But if this happens, replace it with an original one - do not use incandescent lampsas they generate too much heat and can damage plastic parts.
What to do if something burns out in the refrigerator: step-by-step instructions
If you suspect a malfunction, follow the algorithm:
- Disconnect the refrigerator from the mains and do not turn it on until finding out the cause (especially if you smell a burning smell!).
- Inspect the plug and power cord to check for melting or damage to the insulation.
- Check the back wall —if the compressor or relay is burnt, it will be visible to the naked eye eye.
- Test the circuits with a multimeter (if you have the skills). The resistance of the compressor windings should be within
10–40 Ohm. - Contact a technicianif you are not sure of the diagnosis. Repair attempts without experience can aggravate the breakdown!
The cost of repair depends on the burnt part:
| Part | Replacement cost (rub.) | Difficulty of repair |
|---|---|---|
| Start relay | 1 500–3 000 | Easy (can be replaced yourself) |
| Thermostat | 2 000–4 500 | Medium (requires soldering in electronic models) |
| Control board | 5 000–15 000 | Complicated (needs firmware and configuration) |
| Compressor | 8 000–20 000 | Very complex (replacing freon, vacuuming) |
⚠️ Attention: If the refrigerator is under warranty, do not open it yourself —this will void the warranty. Contact the brand's service center (Samsung, LG, Atlant etc.).
FAQ: Frequently asked questions about burnt-out parts in refrigerator
Can a refrigerator catch fire due to a burnt part?
Theoretically yes, but in practice this is extremely rare. Modern refrigerators are equipped thermal fusesthat turn off the power when overheated. However, if you ignore the smell of burning or smoke, the risk of fire increases. It is especially dangerous when it burns control board —it can melt and emit toxic smoke.
What to do: at the first sign (smell, smoke, sparks) unplug the refrigerator and call a technician.
Why did the new refrigerator burn out a month after purchase?
Most often this is due to:
- ⚡ Power surge (for example, during a thunderstorm or accident at substation).
- 🔌 Factory assembly defect (especially in budget models Beko or Indesit).
- 📦 Improper transportationif the refrigerator was transported lying down (oil from the compressor could get into system).
What to do: contact the store with a request. replacement under warrantyAccording to the Law “On Protection of Consumer Rights”, you have the right to a replacement or refund.
You can Is it possible to repair a burnt-out compressor yourself?
No. A compressor is sealed systemand its repair requires:
- Special equipment for vacuuming and refueling frequency windings or soldering of pipelines
- Knowledge of types of refrigerants (e.g. R600a or R134a).
- Experience in soldering copper tubes.
Self-rewinding of windings or soldering of pipelines does not guarantee performance and can lead to freon leakage. It is better to entrust this to professionals.
How to protect the refrigerator from power surges?
Use:
- Voltage stabilizer (for example, Resanta ASN-2000 or Calm IS350).
- Voltage control relay (turns off power when exiting beyond
190–240V). - Uninterruptible power supply (UPS) for electronically controlled refrigerators.
Do not use cheap network ones filters - they do not protect from impulse surges!
Which refrigerators burn most often?
According to statistics from service centers, most often problems with parts burning out occur in:
- Samsung with the system No Frost (weak point - control board and heating element defrost).
- Indesit and Ariston (start relays and compressors often burn in models older than 5 years).
- Atlant (problems with thermostats and freon leakage).
- Beko (factory assembly defects in budget series).
The most reliable in this regard are Liebherr, Bosch i Miele, but their cost is much higher.