Why the upper chamber in the refrigerator does not cool well: reasons and methods elimination

If the freezer compartment in your refrigerator is working properly, but the upper compartment (usually the refrigerator compartment) has stopped cooling or is not doing it enough - the problem requires an immediate solution. Such a malfunction not only spoils the products, but also signals possible breakdowns, which over time can completely disable the equipment.

In most cases, poor cooling of the upper chamber is associated with impaired refrigerant circulation, fan malfunction or failure in the control system. However, the reasons can be more trivial - from a condenser clogged with dust to an incorrectly set temperature. In this article we will analyze all possible scenarios: from simple ones (which you can fix in 10 minutes) to serious ones (requiring the intervention of a specialist).

Important understand that the design of refrigerators with two compressors (for example, Liebherr CN 4315 or Samsung RB37J5240SS) and one compressor (as in ATLANT XM 4021-000 or Indesit DF 4180 W) differs. In the first case, the upper chamber may have a separate cooling circuit, in the second it depends on the general one. This affects the diagnostics.

Before starting repairs, check the obvious: is the refrigerator not overloaded with products, is it tightly closed door, whether the equipment is standing close to the wall or radiator. If these factors are excluded, read on.

1. Clogged air circulation system

In refrigerators with a system No Frost (for example, Bosch KGE39XW2AR or LG GA-B489YGQZ), cooling of the upper chamber depends on the uniform distribution of cold air. If the ventilation ducts are clogged with ice or dust, the flow weakens and the temperature in the compartment rises.

The first sign of a problem is uneven cooling: the back wall of the chamber is covered with frost, but the front remains warm. Also pay attention to the noise: if the fan hums louder than usual or periodically stops, ice is likely blocking its blades.

• ❄️ Ice plug in the duct. Often occurs during rare defrosting or malfunction of the defrosting system.
• 🌀 Dust on the fan blades. Accumulated dirt slows down rotation, reducing cooling efficiency.
• 🔌 Clogged drainage hole. The water does not drain, freezes and blocks the channels.

To remove the blockage:

1. Unplug the refrigerator and defrost it for 12-24 hours.
2. After defrosting, clean the drainage hole (usually located on the back chamber wall) using a cotton swab or a special brush.
3. Check the ventilation grilles - they should be free of ice and debris.

2. Malfunction of the blower fan

The fan in the system No Frost is responsible for moving cold air from the freezer to the refrigerator compartment. If it breaks, the top compartment will stop cooling, and the freezer will work as usual (or even freeze).

Signs of a broken fan:

• 🔇 No noise from the back of the refrigerator (normally a slight whirring sound is heard).
• ❄️ Severe freezing rear wall of the freezer (air does not go up).
• 🌡️ Temperature difference between the top and bottom shelves more than 5°C.

How to check the fan:

1. Unplug the refrigerator and remove the back panel of the freezer (in most models it is secured with latches or screws).
2. Try to turn the fan blades by hand - they should rotate freely, without jamming.
3. Connect the refrigerator to the network and listen: if the fan does not start, but it is receiving power (checked with a multimeter), replacement is required.

How to temporarily start a refrigerator without a fan?

If the fan is broken and repairs are postponed, you can manually redistribute the cold: once every 2-3 hours, open the freezer for 1-2 minutes so that cold air enters the upper chamber. This is not a solution to the problem, but it will help preserve food for 1-2 days.

3. Problems with the thermostat or temperature sensor

The thermostat (or electronic sensor in modern models) regulates the operation of the compressor. If it fails, the compressor can does not turn on enough to cool the upper chamber or work without stopping, but the cold does not get where it is needed.

Symptoms of a thermostat malfunction:

• 📉 The compressor turns on rarely or not turns off completely.
• 🌡️ The temperature in the refrigerator compartment is above +10°C, despite the maximum settings.
• 🔄 An error flashes on the display (for example, E1 or H1 c refrigerators Samsung, F02 in Indesit).

For diagnostics:

1. Find the thermostat (usually located inside the chamber, behind the plastic panel).
2. Remove the terminals and check the resistance with a multimeter. Normally, at room temperature, it should be within 2–5 kOhm (exact values). see the documentation for the model).
3. If there is no resistance or does not change when the sensor cools (for example, ice in polyethylene), the part is faulty.

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4. refrigerant or clogged capillary tube

If the upper chamber in the refrigerator does not cool, and the freezer works poorly, there may be a clog in the circulation system. This is one of the most serious breakdowns, as it requires professional repair. one compressor the upper chamber does not cool, and the freezer works poorly, it is possible freon leak or a blockage in the circulation system. This is one of the most serious breakdowns, as it requires professional repair.

Signs of a refrigerant leak:

• 🔧 The compressor works without stopping, but no cold is produced.
• 🧊 Condenser (the grill on the back wall) remains at room temperature (normally it should heat up).
• 💧 Oil on the floor under the refrigerator (a sign of damage to the tubes).

Clogged capillary tube manifests itself in a similar way, but more often occurs after long-term use (10+ years) or improper refilling of freon. In this case, the compressor overheats, and the cold. goes only to the freezer.

What to do:

⚠️ Attention! It is impossible to eliminate a leak or blockage on your own - you need special equipment (vacuum pump, pressure gauges) and certified refrigerant. Do not try to “top up” the refrigerator without experience: this is dangerous to your health and can damage the equipment.

5. Malfunction of the compressor or start relay

The compressor is the “heart” of the refrigerator. If it does not work correctly, cold can only enter the freezer, and the upper chamber will remain warm:

• 🔌 The starting relay has burned out —. the compressor does not start or turns on for a few seconds and turns off.
• ⚡ Interturn short circuit in the compressor winding - the motor hums, but does not create pressure.
• 🛠️ Wear of the piston group — the compressor works, but does not pump refrigerant into the upper chamber.

For diagnostics:

1. Turn off the refrigerator and remove the back cover.
2. Check the start relay: if when shaking a knocking sound is heard (loose contacts), it needs to be replaced.
3. Measure the resistance of the compressor windings with a multimeter. Normal values:
   • Working winding resistance: 10–30 Ohms.
   • Starting winding resistance: 20–50 Ohms.

If there is no resistance or tends to zero, the compressor is faulty. In this case, it is more rational to consider buying a new refrigerator, since replacing the compressor costs 50–70% of the cost of the equipment.

Disconnect the refrigerator from the network

Check the voltage in the outlet (should be 220–230 V)

Listen to the sound of the compressor (hum, clicks, no noise)

Touch the capacitor (should be warm)

Ring the starting relay with a multimeter -->

6. Loss of door seal

If the sealing rubber on the door of the upper chamber is worn out or deformed, warm air penetrates inside and the refrigerator cannot cope with cooling. This problem is relevant for models with one cooling system (for example, ATLANT MHM 1705-80 or Birusa 101), where the freezer and refrigerator compartment depend on one compressor.

Signs of a leak:

• 🚪 The door does not close tightly (a gap of more than 2 mm is visible).
• 💨 Condensation accumulates on the walls of the chamber.
• ❄️ The compressor runs longer than usual, trying to compensate for the heat influx.

How to check the seal:

1. Take a sheet of paper and clamp it with the door. If the sheet is pulled out without effort, the seal is not sealed.
2. Inspect the rubber for cracks, dirt or deformations.
3. Wash the seal with warm water and soap and lubricate with silicone grease (for example, WD-40 Specialist).

If the seal is damaged, it needs to be replaced. For most models, universal tapes are suitable (for example, 3M Scotch 4010), but it is better to select the original part according to the model code.

7. Failures in the electronic control unit

In refrigerators with electronic control (for example, Samsung RL62NBSA1 or LG GB-B539SLQZ) the board is responsible for the distribution of cold. If it fails, the upper chamber may stop cooling, even if the freezer is working normally.

Signs of a board malfunction:

• 📱 The display shows incorrect temperature or errors (Er IF, E3).
• 🔄 The refrigerator reboots spontaneously.
• 🔌 The fan and compressor turn on randomly.

What to do:

1. Turn off the refrigerator for 10-15 minutes, then turn it on again. Sometimes this resets the temporary ones. failures.
2. Check the voltage in the network - surges can damage the board.
3. If the reset does not help, contact the service. Repairing the board costs 3-7 thousand rubles, replacement - up to 15 thousand.

⚠️ Attention! Do not try to solder or clean the board yourself without experience. microcircuits sensitive to static electricity.

Comparison of causes and solutions

FAQ: Frequently asked questions about poor cooling of the upper chamber

Is the freezer working, but the refrigerator compartment is not?

Not always in refrigerators. data-i="209">(for example, with one compressor. (For example, ATLANT or Indesit) the cold first enters the freezer, and then into the upper chamber. If the freezer freezes and the refrigerator compartment is warm, it is likely:

• Clogged air duct (in models No Frost).
• Fan malfunction.
• Refrigerant leak in the upper chamber circuit (in refrigerators with two evaporators).

First defrost the refrigerator for 24 hours. If the problem persists, call a technician.

The refrigerator is noisy, but does not cool the upper chamber. What's wrong?

The noise can come from:

• Compressor, which is running idle (for example, when there is a freon leak). data-i="221">Compressor
• Fan, the blades of which are blocked by ice.

Turn off the refrigerator and check:

1. Is the condenser heating up (the grill at the back). If not, there is a leak. frequency blocking the air duct.
2. Does the fan in the freezer rotate (with the door open).

After defrosting, the upper chamber does not cool. What to do?

Probable reasons:

• The moisture did not escape through the drainage hole and froze, blocking the air duct.
• The defrost heater has burned out (in models No Frost).
• The control board has failed after turning off the power.

Actions:

1. Defrost the refrigerator again for 12 hours.
2. Clean the drainage hole.
3. If that doesn’t help, check the fan and heater (you need a multimeter).

Can you charge freon yourself?

No. To charge the refrigerant you need:

• Vacuum pump (to remove moisture from the system).
• Gauge manifold (for pressure control).
• Certified freon (for example, R134a or R600a, depending on the model).

Errors during refilling will lead to:

• Damage to the compressor.
• Explosive situation (freon R600a flammable!).
• Loss of warranty (if the refrigerator is new).

How to extend the life of a refrigerator after repair?

Follow the rules:

• 🧊 Defrost the refrigerator every 6 months (even if it No Frost).
• 🧹 Clean the condenser (rear grill) from dust once a year.
• 🚪 Do not slam the door - this will deform the seal.
• 🌡️ Do not place the refrigerator next to the stove or radiator.

For models with one compressor (ATLANT, Birusaavoid overloading the freezer - this will worsen the cooling of the upper chamber.