The refrigerator works, but does not cool - what to do? Causes and solutions

Have you noticed that the refrigerator is on, the motor is humming, the light inside is on, but the food is not cooling? This is one of the most common malfunctions that owners of equipment Atlant, Samsung, Indesit and other brands encounter. In 80% of cases, the problem can be solved without calling a technician - it is enough to correctly diagnose the cause.

In this article we will analyze all possible reasonswhy the refrigerator works, but does not cool: from a banal clogged fan to serious compressor breakdowns. You'll learn how to check the thermostat, detect a freon leak, and exactly when it's time to call a professional. And for those who are ready to act on their own - detailed instructions with photos and diagrams.

Before starting the repair, unplug the refrigerator and get all the products. This will protect them from damage and protect you from electric shock. If water has accumulated in the chamber, this is an indirect sign of problems with the defrosting system or drainage.

1. Let's check the obvious: 5 simple reasons

Sometimes the refrigerator does not get cold because of little things that are overlooked. Start with these points - they do not require disassembling the equipment and take less than 10 minutes.

• 🔌 Power and socket. Make sure that the plug is firmly inserted into the outlet and that the outlet itself is working (connect another appliance). If the refrigerator is connected via an extension cord, try inserting it directly.
• 🌡️ Temperature mode. Perhaps someone accidentally turned the temperature control to minimum or turned on the defrost mode (Defrost). In models No Frost check whether the function Holiday (vacation) is activated.
• 🚪 Door closure tightness. Check to see if a foreign object (for example, a bag of groceries) is interfering with the seal. Carry out a test with a sheet of paper: if it easily pulls out when the door is closed, the seal is worn out.
• 🧊 Overload with products. If the refrigerator is packed to capacity, air circulation is disrupted. This is especially true for models with a system No Frost, where the fan must move air freely.
• ☀️ External temperature. The refrigerator will not work properly if it is placed next to a radiator, stove, or in direct sunlight. Optimal room temperature - 16–32°C.

If all points are normal, but the refrigerator still does not freeze, we move on to in-depth diagnostics. In 60% of cases, the thermostat or compressor is to blame, but the exact cause can only be identified after checking the key components.

2. Thermostat (thermostat): how to check and replace

The thermostat is the “brain” of the refrigerator, which controls the temperature and sends signals to the compressor. If it breaks, the motor may run continuously or, conversely, not turn on at all. Signs of a thermostat malfunction:

• 🔄 The compressor turns on for 5-10 seconds and immediately turns off (the cycle is repeated constantly).
• ❄️ There is ice in the freezer, and heat in the refrigerator (or vice versa).
• 📉 The temperature does not correspond to the set temperature regulator.

To check the thermostat, you will need a multimeter. Algorithm of actions:

1. Disconnect the refrigerator from the network and remove the protective cover of the thermostat (usually located inside the chamber, behind the plastic panel).
2. Disconnect the wires from the thermostat (take a photo of their location!).
3. Switch the multimeter to resistance testing mode (200 Ω).
4. Touch the thermostat contacts with the probes:
   • At room temperature, the resistance should be 0 Ω (closed).
   • If you cool the sensor (for example, put it in ice for 5 minutes), the resistance should become ∞ (open).

If the readings do not change, the thermostat is faulty. Replacement will cost 1 500–3 500 ₽ (depending on the model). For refrigerators Stinol, Beko and Liebherr universal thermostats are suitable. data-i="95">or K59 or Danfoss 077B6.

⚠️ Attention: In refrigerators with electronic control (for example, Samsung RB37J5a temperature sensor is used instead of a mechanical thermostat. It is checked according to a different principle - diagnostics of the control board is needed.

3. The compressor: why it hums but does not freeze

The compressor is the “heart” of the refrigerator, which pumps freon through the system. If it works, but does not create the required pressure, there will be no cold:

To check the compressor, follow these steps:

1. Turn off the refrigerator and remove the back cover (in most models the compressor is located at the bottom).
2. Inspect the start relay - if it is melted or smells like burning, it needs to be replaced.
3. Ring the compressor windings with a multimeter:
   • Resistance between contacts C–S (common and starting winding) - 20–40 Ω.
   • Resistance between C–R (common and working winding) - 10–20 Ω.
   • Resistance between S–R (starting and working) - the sum of the two previous values.

If the readings are equal 0 or ∞ —the windings are broken or torn. The compressor must be replaced.

In refrigerators No Frost the compressor may not work due to a faulty fan. Check whether the blade rotates when the motor is running. If not, the circuit may be broken or the fan motor may be damaged.

How to check the start relay without a multimeter?

Turn off the refrigerator, remove the relay from the compressor and shake it. If you hear a knock or rattle inside, the contacts are burnt out, the part must be replaced.

4. Freon leak: how to detect and what to do.

Freon is a refrigerant that circulates through the system and removes heat. If it leaks, the refrigerator stops freezing, although the compressor is running. Signs of a leak:

• 🧊 The condenser (grid at the back) remains cold even after an hour of operation.
• 🔍 On the tubes or in In the soldering area, oil stains are visible (freon comes out along with the oil).
• ❄️ The freezer is covered with ice, but the temperature does not drop below 0°C.

It is impossible to fill the freon yourself - this requires special equipment and a certificate. But you can detect the place. leaks:

1. Turn off the refrigerator and inspect all solders and pipe joints, look for rust, green deposits or oil stains.
2. Pay attention capillary tube (thin copper tube coming from the filter drier). It often chafes or bursts due to vibration.
3. If nothing is visible visually, you can use a soap solution: apply it to suspicious areas and turn on the refrigerator. Bubbles will appear at the leak site.

Frequent places for freon leaks:

• 🔧 Compressor soldering area (due to vibration).
• 🧲 Freezer evaporator (aluminum corrosion).
• 🔄 Filter drier (cracks over time).
• 📦 Tubes passing through the body (grind during transportation).

⚠️ Attention: Freon R600a (used in modern refrigerators) is flammable! Do not use open flames to find leaks. In models older than 2010, it could be used R134a or R12 - they are less dangerous, but also require caution.

The cost of repairing leaks and refilling freon is from 3,000 to 8,000 ₽, depending on the model and refrigerant volume. In refrigerators Side-by-Side (for example, LG GC-B247SLUV), the price can reach up to 12 000 ₽ due to the difficulty of accessing the evaporator.

5. Capillary tube clogged: how to clean the system

The capillary tube is a thin channel through which freon enters the evaporator. If it becomes clogged (for example, with particles of oil or moisture), the refrigerant cannot circulate and the refrigerator stops freezing. Signs of a blockage:

• 🔄 The compressor works without stopping, but the condenser remains barely warm.
• ❄️ The freezer is covered with a “snow coat”, but the temperature does not drop.
• 💧 On the back wall of the refrigerator compartment water accumulates.

It is better to entrust cleaning the capillary tube to a specialist, but if you are confident in your abilities, you can try to do it yourself. You will need:

• 🔧 Set for soldering copper tubes.
• 🧲 Nitrogen cylinder (for purging).
• 🔨 Pipe cutter.
• 🛠️ Filter drier (be sure to replace after cleaning!).

Procedure:

1. Bite off the capillary tube next to the filter drier.
2. Connect a nitrogen cylinder and blow the system towards the compressor (pressure 10–15 atm).
3. If the blockage does not go away, repeat the purge or use a special solvent (for example, R141b).
4. Install a new filter drier and seal the tube.
5. Evacuate the system and refill freon.

Without experience in soldering and working with refrigerants, you should not undertake this procedure - the risk of damaging the system is too high. In a service center, cleaning the capillary tube will cost $ 4 000–7 000 ₽.

6. Problems with the No Frost system: fan, heating element, sensors

In refrigerators with a system No Frost (for example, Bosch KGN39XL45 or Samsung RB33J3) the reason for the lack of cold is often a fan malfunction, Defrosting heating element or sensors. Let's consider each problem separately.

6.1. The fan does not work

The fan is responsible for circulating cold air. If it is broken, the freezer will work, but the refrigerator will not. Signs:

• 🔇 In the refrigerator. quieter than usual (no blade noise).
• 🧊 The freezer is covered with ice, but the refrigerator compartment is warm.

To check the fan:

1. Unplug the refrigerator and remove the back panel in the freezer.
2. Try to turn the fan blade by hand - if it does not rotate, it means the bearing is jammed.
3. Ring the motor winding with a multimeter (the resistance should be 200–500 Ω).

6.2. The defrosting heating element has burned out

The heating element is defrosting evaporator from ice. If it does not work, the evaporator freezes and the air stops circulating. Signs:

• ❄️ There is a thick layer of ice on the back wall of the freezer.
• 🔄 The refrigerator works without stopping, but does not freeze.

You can check the heating element with a multimeter:

• Disconnect the wires from the heating element.
• Measure the resistance - it should be 20–60 Ω.
• If the device shows ∞ —the heating element has burned out.

6.3. Temperature sensors are faulty

The systems No Frost use several sensors: in the freezer, refrigerator compartment and on the evaporator. If at least one of them is lying, the control unit does not regulate the temperature correctly. You can only check the sensors using diagnostic equipment (for example, a tester for Samsung or LG).

⚠️ Attention: In refrigerators No Frost you cannot mechanically chip away the ice from the evaporator - this can damage the tubes and lead to freon leakage. Use only soft defrosting (turn off the refrigerator for 12-24 hours).

7. When to call a technician: 5 signs of a serious breakdown

Some faults cannot be fixed on your own. Here are cases when you definitely need a professional:

• 🔧 Leakage freon - special equipment is required for refueling.
• 🔄 Stuck compressor —needs replacement with evacuation of the system.
• 📱 Faulty electronic board —you can’t do without a circuit and a soldering iron.
• 🧲 Failure of the compressor winding —the motor needs to be repaired replacement.
• 🔥 Clogging in an inaccessible place (for example, in the evaporator of a freezer).

Average prices for repairs in service centers:

When choosing a technician, pay attention to:

• 📝 Warranty (minimum 6 months for work and 1 year for spare parts).
• 🔧 Certificate for work with freon.
• 📱 Reviews (check at Yandex.Maps or 2GIS).

FAQ: Frequently asked questions about a non-working refrigerator

Is it possible to turn on the refrigerator after transportation if it does not freeze?

No! After transportation (especially lying down), oil from the compressor may enter the capillary tube and cause blockage. Wait 4–6. hours in a vertical position before turning on the refrigerator.

The refrigerator works, but does not turn off. What should I do?

This is a sign that the compressor cannot reach the desired temperature. Reasons:

• Freon leak.
• Clogged capillary tube.
• Thermostat malfunction.
• Failure of the temperature sensor (in models with electronic control).

Turn off the refrigerator and call a technician for diagnostics.

Why is there ice in the freezer, but warm in the refrigerator?

Probable reasons:

• The fan does not work (for No Frost).
• The drain hole is clogged (water does not drain out, ice forms).
• Freon leak in the refrigeration chamber circuit.
• The magnetic valve is faulty (in two-compressor models).

How much does it cost to diagnose a refrigerator at home?

The cost of diagnostics in most services is 500–1 500 ₽. If you agree to repair, this amount is usually deducted from the total cost. In some companies, diagnostics are free when ordering repairs.

Is it possible to fill the refrigerator with freon yourself?

Technically possible, but highly not recommended. For refilling you need:

• A vacuum pump.
• Cylinder with freon (brand must be the same as the original one).
• Gauge manifold.
• Experience in soldering copper tubes.

An error during refueling can lead to damage to the compressor or explosion (if you use incompatible freon). It is better to entrust this to a professional.