Atlant two-chamber refrigerator does not freeze the upper chamber: 9 reasons and what to do

The two-chamber refrigerator Atlant has long established itself as a reliable technique with an optimal price-quality ratio. But even such models can fail over time - one of the most common problems: the upper chamber has stopped freezing, while the lower compartment works fine. Owners often notice that the compressor is humming, the light inside is on, but the temperature in the freezer rises to +10°C and higher, and food begins to spoil.

In this article we will look into it all possible causeswhy the upper chamber does not freeze in refrigerators Atlant models MHM 1705-80, MHM 1842-80, MHM 2835-90 and other popular series. You will learn how to diagnose a breakdown yourself, when you can do without a technician, and in which cases professional repairs are required. We will also give step-by-step instructions for troubleshooting with photos and video examples.

1. Typical signs of a malfunctioning upper chamber

Before looking for the cause, it is important to accurately determine the symptoms. In refrigerators Atlant with a system No Frost and drip defrosting, the manifestations of failure may differ. Pay attention to the following signs:

• 🔴 The temperature in the freezer is above 0°C, despite the maximum thermostat settings.
• ❄️ Ice on the back wall of the upper chamber (typical for models with a drip system).
• 🔊 The compressor works without stopping or, conversely, it rarely turns on.
• 💡 The fan does not spin (in models with No Frost only a hum is heard, without air flow).
• 🌡️ Condensation on the seal or water leaks inside the chamber.

If at least 2-3 signs coincide, the problem is definitely in the upper chamber. In 60% of cases, clogged capillary tube or malfunction of the magnetic valve (for models with one compressor) are to blame. Less commonly, there is a freon leak or sensor failure. Next, we will analyze each reason in detail.

2. TOP 3 reasons why the upper chamber does not freeze (and how to fix them)

Let's start with the most common breakdowns that you can diagnose and fix yourself. These faults account for about 70% of all calls to service centers regarding refrigerators Atlant with a similar problem.

2.1. Capillary tube clogged (symptom: compressor is hot, but does not cool)

The capillary tube is a thin copper channel through which freon enters the evaporator. Over time, it can become clogged with oil decomposition products or moisture. Signs of a blockage:

• 🔥 The compressor overheats (case temperature is above 70°C).
• ⏳ The refrigerator runs for a long time (more than 30 minutes without stopping), but does not freeze.
• 🧊 The condenser (grid at the back) remains cold.

How to check:

1. Disconnect the refrigerator from the network for 12 hours (the freon will be redistributed).
2. Turn it on again and touch the condenser after 15 minutes - if it is heated, but the upper chamber does not freeze, the blockage is confirmed.

⚠️ Attention: Do not try to clean the tube mechanically (with wire, air) - this will lead to depressurization of the system. The only way to fix it is rinsing with a special solution or replacing the tube in the service.

2.2. Failure of the magnetic valve (for models with one compressor)

In refrigerators Atlant with one motor (for example, MHM 1705-80) is responsible for cooling both chambers. magnetic valve. It switches the flow of freon between the freezer and refrigerator compartment. If the valve is jammed, freon goes only to the lower chamber.

Signs of valve malfunction:

• 🔄 The refrigerator compartment freezes too much (food freezes).
• ❄️ The temperature in the freezer is positive, but the compressor is working.
• 🔊 There are no clicks when switching the valve (normally audible when changing the mode).

How to temporarily solve the problem:

1. Find the valve (usually it is located next to the compressor at the bottom rear).
2. Gently tap it with a screwdriver (sometimes it helps if it is stuck mechanically).
3. If it does not help, a replacement is required (the cost of the part is ~1500 rub., work ~2000 rub.).

Check whether the refrigerator compartment is freezing (if so, the valve is faulty)|

Listen for clicks when switching modes|

Inspect the valve for melting or corrosion|

Try knocking on the valve body (sometimes it helps with jamming)-->

2.3. Freon leak (symptom: the compressor works, but does not pump in cold)

Freon can leak through microcracks in the tubes or solder joints. In Atlant most often a leak occurs in freezer evaporator (due to corrosion of aluminum tubes) or in copper connection points pipes.

Signs of a leak:

• 🕳️ The compressor works without stopping, but there is no cold.
• 🧊 The condenser (grid at the back) remains at room temperature.
• 🔍 Visible oil stains on pipes (freon comes out along with the oil).

How to confirm a leak:

1. Turn off the refrigerator and inspect the pipes for traces of oil.
2. Check the solder joints - green oxidation spots are often visible there.
3. If there is a leak detector (a device for detecting freon), use it.

⚠️ Attention: It is impossible to eliminate the leak on your own - it requires re-soldering of tubesevacuating the system and refilling freon. Average repair cost: RUB 3,500–6,000. depending on the model.

3. Other possible causes (less common)

If the three main causes do not apply to your situation, check the following faults. They are less common, but can also lead to a lack of frost in the upper chamber.

Sensors break down especially often in electronically controlled models (Atlant MXM 2835-90, MXM 2844-90). If the display shows an error E1, E2 or Hmost likely the problem is in the sensor or board.

How to reset the error on the Atlant display?

To reset the error, unplug the refrigerator for 10–15 minutes. If the error appears again, diagnostics of the sensors or board is required. In models with a button Super Freeze try pressing and holding it for 5 seconds.

4. Step-by-step instructions: what to do if the upper chamber does not freeze

Before calling a technician, follow these steps. In 40% of cases, the problem is solved without repair.

1. Thaw the refrigerator completely (for 12–24 hours). Often ice blocks the operation of the fan or sensors. After defrosting, turn it on and check the temperature after 2-3 hours.
2. Check the sealing rubber on the freezer door. If it is torn or deformed, warm air penetrates inside. Carry out a test with a sheet of paper: if it easily pulls out when the door is closed, the seal needs to be replaced.
3. Inspect the fan (in models with No Frost). It should spin without noise. If the blades are frozen, defrost and clean.
4. Listen to the compressor. Normally, he works in cycles (works for 10–20 minutes, rests for 5–10 minutes). If it hums continuously or does not turn on at all, the problem is in the motor or freon.
5. Check the settings. Make sure that the thermostat is set to -18°C (or Max), and the mode Super Freeze is activated (if any).

If after these steps the freezer does not work, proceed to diagnosing specific components (see sections above).

5. When to call a repairman: 5 signs of a serious breakdown

Some faults cannot be fixed on your own. Contact the service center if:

• 🔧 The compressor does not turn on at all (no hum, does not heat up).
• 💨 There is a burning smell from the refrigerator (the motor winding may have burned out).
• ❄️ Rusty spots appeared on the back wall of the freezer (leakage of freon through corrosion).
• 🔌 After a power surge, the refrigerator stopped freezing (probably the board burned out).
• 📉 The temperature in the freezer rises, despite the continuous operation of the compressor (system clogged or leak).

Average prices for repairs in service centers (for 2026):

• Replacement of the compressor: 5000–8000 rubles.
• Leak elimination + freon refill: 3500–6000 rub.
• Repair of the control board: 3000–5000 rub.
• Replacement of the magnetic valve: 2500–4000 rub.

⚠️ Attention: If the refrigerator is on warranty (usually 1-3 years), do not disassemble it yourself - this will void the warranty. Contact an authorized service center Atlant.

6. Prevention: how to avoid breakdowns of the upper chamber

To extend the life of the refrigerator Atlant and to avoid problems with the freezer, follow these recommendations:

• ❄️ Defrost the refrigerator every 6 months (even if the model is with No Frost). Frost of more than 5 mm impairs heat transfer.
• 🔌 Use a voltage stabilizer. Network surges are the main cause of breakdowns of boards and compressors.
• 🚪 Do not overload the freezer door. The shelves on the door are designed for weights up to 1–2 kg. Heavy products (bottles, cans) deform the seal.
• 🧹 Clean the condenser once a year. Dust on the grille at the back impairs the cooling of the compressor.
• 🌡️ Do not place the refrigerator next to the stove or radiator. Optimal room temperature: +16...+30°C.

Also avoid frequent opening of the freezer door in hot weather - this leads to icing of the evaporator and overload of the compressor.

Frequently asked questions (FAQ)

The freezer does not freeze, but the light inside is on. What is the problem?

If there is light, but there is no cold, the problem may be:

• compressor malfunction (does not turn on or does not build up pressure);
• freon leak;
• thermostat failure or sensor;
• clogging of the capillary tube.

First check if the compressor is working (it should hum and heat up). If so, most likely there is a leak or a blockage.

Refrigerator Atlant MXM 1842-80: the upper chamber does not freeze, but the lower one works. What to do?

In this model, the magnetic valve is to blame (90% of cases). It switches the cold between chambers. Try: with one compressor The magnetic valve is to blame (90% of cases). It switches the cold between chambers. Try:

1. Turn off the refrigerator for 10 minutes, then turn it on.
2. Knock on the valve (located at the back, next to the compressor).
3. If that doesn’t help, replace the valve (cost ~2500 rub.).

After defrosting, the upper chamber stopped freezing. Why?

Probable reasons:

• In the model with No Frost the fan could freeze (you need to defrost it again for 12+ hours).
• During defrosting, the evaporator tube was damaged (leakage freon).
• The temperature sensor burned out due to condensation.

Check whether the fan is spinning (in models with No Frost) and whether there are oil stains on the tubes.

Is it possible to fill freon into the refrigerator yourself Atlant?

No. Refilling freon requires:

• special equipment (vacuum pump, pressure gauges);
• experience in soldering copper tubes;
• knowledge of types of freon (usually used Atlant usually used R-134a or R-600a).

Improper refueling can lead to compressor explosion or poisoning (freon is toxic. Contact service.

How much does it cost to repair if the upper chamber does not freeze?

The cost depends on the reason:

Breakage	Cost (rub.)
Replacement of the magnetic valve	2500–4000
Leak elimination + refueling	3500–6000
Replacement of the compressor	5000–8000
Repair of the control board	3000–5000
Cleaning the capillary tube	2000–3500

Prices are relevant for Moscow and the regions for 2026 In small cities, repairs. may cost 10–20% cheaper.