Freezer in the refrigerator: what is it, how does it work and why is it needed

You opened the instructions for the new refrigerator, came across the mysterious word “freezer” - and now you are wondering how it differs from the usual freezer? Or maybe your old unit suddenly stopped freezing, and the technician mentioned the malfunction of this particular unit? In both cases, you have come to the right place.

The term “freezer” (from English freezer —“freezer”) often causes confusion. Some people think that this is a separate compartment for super-fast freezing, others are sure that we are talking about a special operating mode. In fact a freezer is a technical element of the cooling system, without which normal operation of the freezer is impossible. In this article we will look at:

• 🔍 what a freezer is in terms of refrigerator design;
• ❄️ how it is connected to the freezer and why it is confused with it;
• ⚙️ what are the signs to identify a malfunction;
• 🛠️ is it possible to repair the freezer yourself (and when you should definitely not do this).

Spoiler: if your refrigerator NoFrost or Frost Free suddenly began to freeze worse, the problem most likely lies right here. But don’t rush to panic - let’s figure it out in order.

Freezer and freezer: what is the difference?

The main mistake is to consider a freezer as a synonym for the freezer compartment. In fact a freezer is the evaporator of the freezer, that is, that part of the system where the refrigerant (freon) actively takes heat from the air, cooling the products. And the freezer is the entire compartment, including shelves, door and seals.

Simply put, the freezer is the “heart” of the freezer, its working body. In refrigerators with a NoFrost system, it is usually hidden behind the back wall and looks like a coil of aluminum tubes with ribs. In models with drip defrosting (Direct Cool), the freezer can be open - it can be seen on the back wall of the freezer in the form of a metal panel.

• 🧊 Freezer compartment is the entire freezing compartment (volume, shelves, temperature from −6° to −24°C).
• ❄️ Freezer is an evaporator inside the freezer (the temperature on its surface can drop to −30°C).
• ⚙️ Compressor is a “pump” that drives the refrigerant through the system (including the freezer).

Why is it important to understand this difference? Because a freezer malfunction is not a breakdown of the entire freezer compartment, but a problem with a specific unit that can be replaced or repaired.. For example, if in a refrigerator Samsung RB37J5240 the upper chamber has stopped freezing, but the light is on and the compressor is working, the freezer is most likely to blame, and not the thermostat or electronic unit.

How a freezer works: the physics of the process

To understand why a freezer is so important, let's figure out how it functions in conjunction with other elements of the cooling system. It all starts with a compressor:

1. Compressor compresses gaseous freon, heating it to a high temperature.
2. Hot freon enters condenser (grid on the back wall of the refrigerator), where it cools and turns into liquid.
3. Liquid freon through capillary tube enters the freezer (evaporator).
4. In the freezer freon becomes gas again absorbing heat from the air in the freezer - this is how cooling occurs.
5. The cycle repeats.

Key point: the freezer is the place where the freon boils, moving from a liquid state to gaseous. It is this process that takes away heat, creating cold. If the freezer is covered with ice (in models without NoFrost) or becomes clogged with dust, the efficiency of heat transfer drops and the freezer begins to work worse.

In refrigerators NoFrost The process is complicated by the presence of a fan that evenly distributes cold air from the freezer throughout the chamber. In models with drip defrosting (Indesit BIAA 13, ATLANT MXM 1705), the freezer is often combined with the back wall, and its freezing requires regular thawing.

Why does the freezer freeze?

In refrigerators without NoFrost, moisture from the air condenses on the cold evaporator (freezer) and freezes, forming an ice crust. In NoFrost systems, the ice melts automatically during defrosting, and moisture is removed outside.

Signs of a freezer malfunction: when to sound the alarm

The freezer is a vulnerable element, especially in refrigerators with manual defrosting. Here 5 key symptomsthat there is something wrong with it:

• ❄️ The freezer does not freeze, but the refrigerator compartment is working normally (or vice versa, if there are two freezers).
• ⏳ It takes a long time to gain temperature after defrosting or opening the door.
• 🔊 The compressor works without stopping, but the cold does not gain.
• 💧 There is a thick layer of ice on the back wall of the freezer (even if defrosting was recently).
• 🌡️ The temperature in the freezer rises above −10°C when the mode is set to −18°C.

Please note: if the refrigerator NoFrost (for example, LG GA-B489YDQZ or Bosch KGN39XL30R) stopped freezing, but the fan in the freezer does not spin, the problem may not be in the freezer, but in the fan motor or defrost system. In this case, the freezer simply does not receive cold air for distribution.

⚠️ Attention: If the refrigerator begins to freeze like a normal one, this is a sign of a breakdown of the defrosting system (the heating element, timer or sensor is faulty). The freezer has nothing to do with it - it is “frozen” by the ice due to automatic defrosting not working. NoFrost began to freeze as usual, this is a sign of a breakdown in the defrost system (the heating element, timer or sensor is faulty). The freezer has nothing to do with it - it is “frozen” by the ice due to the automatic defrosting not working.

For diagnostics, you can perform a simple test:

1. Disconnect the refrigerator from the mains for 10-12 hours (complete defrosting).
2. Turn it on again and set it in the freezer to −18°C.
3. After 2-3 hours, check the temperature: if it does not drop below −10°C, the freezer is faulty.

Main causes of freezer breakdowns

The freezer breaks for a reason. Here are the most common reasons (and what to do about them):

The most insidious problem is freon leak. It can occur due to corrosion of the freezer tubes (especially in old refrigerators) or mechanical damage. Symptom: the compressor is humming, but the freezer remains warm. Stinol or ZIL) or mechanical damage. Symptom: the compressor is humming, but the freezer remains warm. In this case, independent repair is impossible - refilling freon is required and searching for the leak location with using a leak detector.

The second most common problem is clogged capillary tube. This happens due to moisture entering the system (for example, when freon is charged incorrectly) or compressor wear. Symptoms: the freezer freezes poorly, the compressor is overloaded and may shut down due to overheating. The solution is to clean the system or replace the capillary.

⚠️ Attention: If your refrigerator NoFrost starts to “cry” (frost appears on the back wall of the freezer, and then water), do not rush to blame the freezer. Most likely, the defrost heating element or timer is broken. In this case, the freezer becomes covered with ice, and the system stops blowing cold air.

Can you fix the freezer yourself?

The answer depends on type of breakdown i refrigerator design. Let's figure it out in order:

What you can do yourself:

• 🧊 Defrosting - if the freezer is overgrown with ice (in refrigerators without NoFrost), It is enough to turn off the unit for 12–24 hours and let the ice melt. After turning on, check the door seals - they may cause freezing.
• 🧹 Cleaning the fan — in models NoFrost (Samsung RL38**, Liebherr CN 4015), the fan may become clogged with dust or ice. It can be carefully cleaned with a brush after defrosting.
• 🔧 Replacing the temperature sensor — if the freezer is cold, but the compressor does not turn on, the problem may be in the sensor. In some models (ATLANT, Indesit) it is easy to replace it yourself (the cost of the sensor is from 500 ₽).

What cannot be repaired without a specialist:

• ⚠️ Freon leak - special equipment is required (vacuum pump, leak detector) and certified freon.
• ⚠️ Clogged capillary tube - you need to purge with nitrogen or replace the capillary.
• ⚠️ Cracks in the freezer tubes - only replacing the evaporator (in some cases it is cheaper to buy a new one refrigerator).

If you decide to disassemble the refrigerator yourself, remember:

• 🔌 Turn off the power and defrost the unit.
• 📸 Take photos of all connections before disassembly.
• 🛠️ Do not use sharp tools next to the freezer tubes - there is a risk of puncture!

How to extend the life of a freezer: prevention

To make the freezer last longer, follow these rules:

1. Regular defrosting (even for NoFrost!). For refrigerators with a drip system - once every 3-6 months, for NoFrost - once a year. This prevents ice from accumulating on the evaporator.
2. Humidity control. Do not place hot or wet foods in the freezer - this will cause the freezer to freeze faster. Use containers with lids.
3. Cleaning the seals. Dust and dirt on the rubber door seals disrupt the seal, causing the freezer to work under overload. Wipe them with soapy water once a month.
4. Correct placement of products. Do not pack the freezer to capacity - air circulation around the freezer should be free.
5. Checking the temperature. Set the freezer to −18°C (optimal for storage) and do not lower it below −24°C unless necessary - this increases the load on the freezer.

For refrigerators NoFrost (Bosch, LG, Samsung) it is especially important to monitor the operation of the fan. If it starts to make noise or stops periodically, this is a sign of icing on the freezer or worn bearings. In this case, defrosting for 24 hours followed by cleaning will help.

⚠️ Attention: If your refrigerator is older than 10 years (for example, Stinol 101 or ZIL-63), the freezer in it is most likely made of aluminum, which corrodes over time. In this case, freon leakage is a matter of time. Prevention will not help, only replacing the evaporator or refrigerator.

Freezer vs. freezer: what is more important when choosing a refrigerator

If you choose a new refrigerator, pay attention to type of freezer and its location. This affects:

• 🕒 Freezing speed (freezers with a fan NoFrost freeze faster).
• 💧 The need for defrosting (drip systems require manual care).
• 🔊 Noise level (fans in NoFrost add ~5 dB to the overall noise).
• 📦 Useful volume (the freezer takes up space, especially in compact models).

Let's compare two popular types:

Parameter	Refrigerators with drip defrosting	NoFrost refrigerators
Freezer type	Open (visible on the back wall)	Closed (hidden behind the panel)
Defrosting	Manual (once every 3-6 months)	Automatic (once a year for prevention)
Freezing speed	Slower (natural convection)	Faster (forced ventilation)
Care	Requires cleaning ice	It is enough to wipe the shelves
Price	10–20% cheaper	More expensive, but more economical in energy consumption

For a family of 3–4 people the optimal choice is a refrigerator with NoFrost in the freezer and a drip system in the refrigerator compartment (for example, ATLANT XM 4425-000 or BEKO GNE 114620 X). It combines the convenience of automatic defrosting and an affordable price. If you need maximum freezing speed (for example, for preparations for the winter), pay attention to models with two freezers - separately for the refrigerator and freezer compartments (Liebherr CNef 4815).

FAQ: Frequently asked questions about the freezer

❓ Why does the freezer become covered with ice, even if the refrigerator is NoFrost?

In systems NoFrost the freezer freezes if the defrosting heating element is broken, the timer or sensor is blocking the fan, and the cold is blocked. stops flowing into the chamber. The solution is to replace the faulty element (usually the heating element, cost ~1,500 ₽).

❓ Is it possible to use the refrigerator if the freezer is broken?

Technically, yes, but only the refrigerator compartment (if there are two freezers) However, the compressor will not work constantly. reduces its resource. It is better to repair the freezer or replace the refrigerator.

❓ How much does it cost to replace a freezer?

The cost depends on the model:

• For refrigerators ATLANT, Indesit — from 3,000 to 5,000 ₽ (with work).
• For Samsung, LG —from 6,000 to 10,000 ₽.
• For premium brands (Liebherr, Miele)—from 12,000 ₽.

In some cases (for example, corrosion of tubes) it is cheaper to buy a new refrigerator.

❓ Why did the refrigerator begin to make noise after replacing the freezer?

This is normal if:

• A new compressor is installed (it “breaks in” for the first 1-2 days).
• There is air left in the system after charging freon (the noise will disappear after a few hours).

If the noise does not go away, check the fastening of the compressor and tubes - they could have become loose during repairs.

❓ How to understand that the freezer is working normally?

Signs of a working one freezer:

• The freezer reaches −18°C within 2–4 hours after defrosting.
• The compressor turns off periodically (work/rest cycle ~20–30 minutes).
• There is no thick layer of ice on the back wall of the freezer (for NoFrost there should be no frost either).
• The fan in the freezer rotates without extraneous sounds (for NoFrost).