A refrigerator is not just a box for storing food, but a complex system of interconnected units, each of which plays its own role. The serviceability of even a small part can determine the temperature inside the chamber, noise level, energy consumption and, ultimately, the service life of the entire unit. But what exactly the most important things in a refrigerator? What elements should you pay attention to when purchasing, operating and repairing?
In this article we will look at 7 critical componentsthat determine the reliability of the refrigerator. You will learn how each of them works, what signs indicate a malfunction, and what can be done to prevent breakdowns. We will pay special attention to those parts that most often fail due to improper care or natural wear.
Spoiler: some elements (for example, a thermostat or seal) can be replaced yourself, but it is better to entrust the repair of a compressor or electronic unit to professionals. But first things first.
1. The compressor is the “heart” of the refrigerator
The compressor is main working bodythat circulates the refrigerant (freon) throughout the system. Without it, the refrigerator turns into an ordinary cabinet. Modern models are equipped with inverter compressors (LG Linear Compressor, Samsung Digital Inverter), which regulate power smoothly, without sudden switching on/off. This reduces the load on the network and extends the service life.
How to understand that there is a problem with the compressor?
- 🔊 The refrigerator works continuously (without pauses) or, conversely, turns on too rarely.
- ❄️ The temperature in the chambers does not correspond to the set temperature (too high or, less often, too low).
- 💥 Heard extraneous sounds: knocking, grinding, loud humming (normally the compressor should be quiet buzz).
- 🔥 Compressor housing (black "tank" at the back) excessively hot (more than 70°C to the touch).
The most A common cause of compressor failure is overheating due to poor ventilation (for example, if the refrigerator is close to the wall) or wrong voltage network. In rural areas, where power surges are not uncommon, it is recommended to connect the refrigerator through voltage stabilizer.
⚠️ Attention: If the compressor turns off 1-2 seconds after starting, this may indicate on interturn short circuit in the winding. In this case, the repair will cost more than buying a new refrigerator (replacing the compressor + refilling with freon ≈ 60–80% of the cost of the equipment).
2. Thermostat and electronic control unit
The thermostat (or thermostat) is the “brain” that is controls the temperature in the chambers. In mechanical models (Atlant, Biryusa) this is a separate device with an adjustment knob, in modern (Samsung RB, Bosch KAN) it is part of the electronic unit. If the thermostat fails, the refrigerator either stops cooling or, conversely, freezes food in the “freshness zone.”
Signs of a thermostat malfunction:
- ❄️➡️🔥 Refrigerator does not turn off or, conversely, does not turn on at all.
- 📉 The temperature in the chambers does not correspond to the set one (for example, in the freezer +5°C instead −18°C).
- 🔄 Frequent temperature jumps (food is either defrosted or frozen).
In electronic refrigerators (LG InstaView, Samsung Family Hub) instead of a mechanical thermostat temperature sensor + control board is used. Here, breakdowns are often associated with oxidation of contacts or firmware failure. For example, after a power surge, the calibration of the sensors may be lost - in this case, resetting the settings to factory settings helps ("Power Cool" + "Fridge" button hold 10 seconds y Samsung).
| Thermoregulator type | Service life | Replacement cost | Can I replace it myself? |
|---|---|---|---|
| Mechanical (capillary) | 5–10 years | 1 500–3 000 ₽ | Yes (with a soldering iron) |
| Electronic sensor | 7–12 years | 2 000–5 000 ₽ | No (board diagnostics required) |
| Electronic control unit | 10–15 years | 5 000–12 000 ₽ | No (programmer required) |
⚠️ Attention: If after replacing the thermostat the refrigerator still does not cool, the problem may lie in freon leak or clogged capillary tube. In this case, you will need to refill the system with refrigerant (cost from 3,500 ₽).
3. Sealing rubber: why it affects everything
Sealant (rubber contour around the perimeter of the door) seems like a small thing, but in fact it is responsible for tightness of the chamber. If the rubber is dry or deformed, warm air penetrates inside, causing the compressor to work in increased mode. This leads to:
- ⚡. Increased power consumption (up to +30% of the norm).
- ❄️ Formation ice on the back wall (due to condensation).
- 🔊 Increase noise (the compressor does not rest).
- 🦠 Development of mold in the cracks of the seal.
How to check seal? Take a sheet of paper, close the door, pressing it between the body and the rubber. If the sheet it is easily pulled out. data-i="140">Replacing the seal will cost 2,000–4,000 rubles (depending on the model). For self-installation you will need the seal lasts 5-7 years, but when the door is opened frequently (for example, in a family with children), wear accelerates.
Replacing the seal will cost RUB 2,000–4,000 (depending on the model). For self-installation you will need hair dryer (to soften the new rubber) and moment glue or double-sided tape Important: before purchasing the seal measure the length of the contour -. even refrigerators of the same brand (Indesit, Ariston) dimensions may differ.
Do not slam the door forcefully|
Wipe the elastic band with soapy water once a month|
Lubricate with silicone grease 2 times a year|
Do not hang heavy objects (bags, towels) on the handle-->
4 Evaporator and system No. Frost: why ice is bad
The evaporator is radiatorin which the refrigerant (freon) evaporates, taking heat from the chamber. In refrigerators with drip system (Atlant, Stinol) the evaporator is located on the back wall, and in models with No Frost (Samsung, LG) - hidden behind plastic panels. The main problem of the evaporator is icing, which worsens heat transfer and causes the compressor to wear out.
Causes of ice formation:
- 🚪 Frequent or long-term opening the door (moist air gets inside).
- 🔧 Malfunction defrost heater (in No Frost systems).
- 🧊 Clogged drain hole (water does not drain, freezes on the evaporator).
- 🌡️ Incorrect room temperature (below +16°C).
In refrigerators No Frost the defrost timer i is responsible for defrosting the evaporator. If the heating element burns out, the ice builds up until it blocks the fan. Signs of breakdown: Heating element. If the heating element burns out, the ice builds up until it blocks the fan. Signs of damage:
- ❄️ In the freezer "snowy fur coat" more than 5 mm thick.
- 🔇 Fan does not make noise (does not work due to ice).
- 📉 The temperature in the refrigerator compartment rises.
You can clean the drainage hole yourself (rinse with warm water and citric acid) or defrost the refrigerator for 12–24 hours. If the problem is in the heating element or timer, a replacement will be required (cost 1,500–4,000 rubles).
What will happen if you ignore ice?
If you do not eliminate the icing of the evaporator, the compressor will work without stopping, which will lead to its overheating and failure. On average, a compressor “killed” by ice lasts 3–5 years less than its intended life. In addition, ice can deform the plastic parts of the camera, and when thawed, cause a short circuit in the electronics.
5. Refrigerant (freon): why its leak is a disaster
Freon is gasthat circulates through the system and provides cooling. Modern refrigerators use ozone-safe refrigerants: R134a, R600a (isobutane), R290 (propane). Freon leakage is one of the most expensive breakdownss because it requires not only refilling, but also searching for the leak location (most often it is copper tubes or soldered seams).
Signs of a freon leak:
- 📉 Refrigerator not cools, but the compressor is working.
- 🔧 On the back wall you can see oil stains (the refrigerant comes out along with the oil).
- 🕳️ There may be hissing at the leak site (if damaged tube).
Repair cost:
- 🔍 Leak diagnostics: 1,000–2,000 ₽.
- 🛠️ Soldering work: 2 000–5,000 ₽ (depending on complexity).
- ⚗️ Refilling with freon: 1,500–3,000 ₽ (price depends on the type of refrigerant).
The most common cause of leakage is mechanical damage pipes when moving the refrigerator or corrosion due to condensation. In refrigerators with R600a (isobutane) leakage is more dangerous: this gas is explosive at high concentrations in the air (although this is unlikely in domestic conditions).
⚠️ Attention: If you suspect a freon leak, do not try to refuel the refrigerator yourselfworking with refrigerants requires certified equipment and experience. Incorrect charging can lead to damage to the compressor or explosion (in case of R600a).
6. No Frost fan: why it breaks and what happens. do
The fan in the systems No Frost is responsible for uniform distribution of cold air the chambers. If it stops, “warm” and “cold” zones form in the refrigerator, and ice builds up on the evaporator:
- ❄️ Icing of the blades (due to a malfunction of the defrost system).
- 🔌 Motor burnout (natural wear and tear after 5–7 years of operation).
- 🧲 Hit foreign objects (for example, pieces of cling film).
How to check the fan?
- Unplug the refrigerator.
- Remove the back panel in the freezer (usually it is secured with latches).
- Try to rotate the blades manually. If they do not rotate or rotate with difficulty, the problem is in the bearings or icing.
- Connect the refrigerator and listen: if the fan does not make noise within 5-10 minutes after starting, it is faulty.
The cost of a new fan is 1,500–3,000 rubles, replacement will cost 2,000–4,000 rubles (depending on the model). In some cases it helps preventive cleaning: just remove the ice and lubricate the bearings with silicone. lubricant.
7. Drainage system: why does it accumulate in the refrigerator. water
The drainage system is responsible for condensate drainwhich is formed during operation of the refrigerator. In models with a drip system, water flows down the back wall into drainage holeand then evaporates in a special tray above the compressor. If the hole is clogged, water accumulates at the bottom of the chamber and then flows out. floor
Causes of blockages:
- 🍂 Getting in crumbs, food particles, dust.
- 🦠 Development mold in the tube.
- 🧊 Freezing of water in the drainage (if the refrigerator is in a cold room).
How to clean the drainage:
- Turn off the refrigerator and take out all the food.
- Find a drainage hole (usually at the bottom of the back wall of the refrigerator).
- Take syringe or a syringe without a needle, fill with warm water and rinse the hole.
- To remove mold, use a solution citric acid (1 tbsp per 200 ml of water).
If water continues to accumulate, check drainage tray (located above the compressor). Sometimes it cracks or moves, and condensation spills past. Replacing the tray will cost 500–1,500 rubles.
FAQ: Frequently asked questions about important parts of the refrigerator
Is it possible to replace the compressor yourself?
Theoretically yes, but in practice it is impractical. required:
- Special equipment (vacuum pump, pressure gauges, freon cylinder).
- Experience in soldering copper pipes.
- Knowledge of the refrigerant charging scheme (for each model it your own).
The cost of work in the service center is 5,000–10,000 ₽, and errors during independent replacement can lead to damage to the new compressor or leakage freon.
How often do you need to defrost a No Frost refrigerator?
Manufacturers claim that refrigerators No Frost do not need defrostingHowever, in practice it is recommended:
- Carry out preventive defrosting once a year (turn off for 12-24 hours, wash, dry).
- Clean ventilation grilles from dust once every 6 months.
- Keep an eye on drainage hole (clean at the first sign of blockage).
This will help avoid ice accumulation on the evaporator and will extend the life of the fan.
Why did the refrigerator start to work loudly?
Causes of increased noise:
- Compressor: wear of bearings, loose fastenings.
- Fan: icing of the blades or ingress of foreign objects item.
- Tubes: vibration due to improper installation of the refrigerator.
- Electronics: malfunction of the relay or control board.
First, check whether the refrigerator is level (adjust the legs). If the noise does not disappear, call a technician for diagnostics.
What to do if the refrigerator does not turn off?
Continuous operation of the compressor can be caused by:
- Malfunction thermostat or temperature sensor.
- Leakage freon.
- Clogged capillary tube.
- Problems with seal (warm air gets inside).
First, check the seal and defrost the refrigerator. If this does not help, diagnostics will be required.
Is it possible to use the refrigerator without the back cover?
No! The back cover performs several important functions:
- Protects compressor and tubes from mechanical damage.
- Provides proper air circulation for cooling the condenser.
- Prevents the contact of dust and moisture dust and moisture
Working without a cover will lead to compressor overheating increasing the risk of a short circuit.