The refrigerator does not freeze or cool - what to do? Reasons and DIY repair

Have you opened the refrigerator, and inside there is room temperature, the food is spoiling, and the motor is running non-stop or completely silent? This is one of the most common breakdowns that owners of equipment Atlant, Indesit, Samsung and other brands encounter. The reasons can be either simple (condenser clogged with dust) or serious (freon leak or compressor failure).

In this article we will look 7 main reasonswhy the refrigerator does not cool, how to diagnose them without calling a technician, and in what cases repair is possible on your own. You will also learn when it is better not to take risks and contact a service center so as not to aggravate the problem. For convenience, we have collected checkliststables with typical symptoms and step-by-step instructions.

Important: if your refrigerator is still under warranty, any independent intervention in the cooling system (depressurization, soldering of pipes, replacement of freon) will lead to loss of warranty.. In this case, first contact an authorized service center.

1. Checking for obvious reasons: power supply, settings, overload

Before disassembling the refrigerator, rule out basic problems that do not require repair:

• 🔌 Power: Make sure that the plug is firmly inserted into the socket and that there is voltage in the network (check the light bulb inside the refrigerator or connect another device).
• ❄️ Cooling mode: The Holiday or Ecomode may have been accidentally turned on, in which the compressor operates at minimum power.
• 📦 Overload with products: If the refrigerator is filled to capacity, air circulation is disrupted and the temperature rises. This is especially true for models with a system No Frost.
• 🌡️ Thermostat: Check whether the temperature regulator is set to position 0 or Off.

If everything is in order, but the refrigerator is still not cooling, proceed to diagnostics technical malfunctions.

2. Clogged cooling system: condenser and fan

One ​​of the common causes of overheating is dirty condenser (grid on the back wall of the refrigerator). Dust and pet hair form a “fur coat” that interferes with heat transfer. As a result, the compressor wears out, but does not have time to cool the chambers.

How to clean the condenser:

1. Unplug the refrigerator and move it away from the wall.
2. Take a vacuum cleaner with a narrow nozzle or a soft brush.
3. Carefully remove dust from the grill without damaging the tubes.
4. Wipe the surface with a damp cloth.

On models with No Frost also check fan in the freezer. If it is frozen or broken, the cold will not flow into the main compartment. To diagnose the problem, open the freezer and listen: if the fan does not make noise, it may be jammed or burned out.

⚠️ Attention: Do not use sharp objects to clean the condenser - you can puncture the freon tubes. If the grille is severely deformed, contact service.

3. Malfunction of the thermostat or temperature sensor

The thermostat (or thermostat) is the “brain” of the refrigerator, which turns the compressor on and off depending on the temperature. If it is broken, the compressor may:

• ❌ Not turn on at all (the refrigerator does not freeze, but the light inside is on).
• ⚡ Work without stopping (freezing or, conversely, insufficient cooling).

How to check the thermostat:

1. Find the thermostat - it is usually located inside the refrigerator compartment, under a plastic panel or next to a light bulb.
2. Remove the protective casing and inspect the contacts for oxidation or breaks.
3. Ring with a multimeter in circuit test mode: when you rotate the control knob, you should hear a click (closing/opening contacts).

If the thermostat does not respond, it needs to be replaced. For models Beko, Liebherr and Bosch universal thermostats K59 or Danfoss 077B6are suitable, but it is better to check compatibility based on the refrigerator model.

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

Freon is a refrigerant that circulates through the system and provides cooling. If the tubes are damaged (for example, due to corrosion or mechanical stress), freon leaks out and the refrigerator stops freezing. Signs of a leak:

• 🔊 The compressor works, but does not turn off (trying to “catch up” the cold).
• ❄️ There is no condensation on the back wall, the tubes do not heat up.
• 🛠️ Oil stains are visible on the floor under the refrigerator (freon mixed with oil).

The leak can only be repaired at a service center! You can do the following on your own:

1. Turn off the refrigerator and defrost it.
2. Inspect the tubes for damage (do not touch them with your hands - you can make the leak worse!).
3. If you find a leak (usually joints or bends), cover it temporarily with tape and call masters.

⚠️ Attention: Freon is non-toxic, but if inhaled in large quantities it can cause dizziness. Ventilate the room if you suspect a leak.

What will happen if you do not repair a freon leak?

Without refrigerant, the compressor will wear out and burn out in 1-2 weeks. Repairs will cost 2-3 times more than timely refueling.

5. Compressor failure: signs and temporary measures

The compressor is the “heart” of the refrigerator. If it is broken, there will be no cooling. Signs of a malfunction:

• 🔇 The compressor does not start (no characteristic hum).
• 🔥 The compressor housing gets very hot (more than 80°C).
• 💥 Protection is triggered (the refrigerator turns off a few seconds after starting).

What you can do yourself:

1. Check starting relay (box next to the compressor). It often burns out due to power surges. Test the relay coil with a multimeter - the resistance should be ~20-40 Ohms.
2. If the relay is working properly, but the compressor does not start, the winding may have burned out. In this case, a new compressor is needed.

Temporary measure: if the refrigerator turns off due to overheating, provide it with good ventilation (move it away from the wall, clean the condenser). This will extend the life of the compressor by a few days, but will not solve the problem.

6. Clogged capillary tube or filter drier

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

• 🧊 The freezer is working, but the refrigerator compartment is not cooling.
• 🔄 The compressor turns on for 5-10 minutes, then turns off (overheating protection is triggered).

How to diagnose a blockage:

1. Turn off the refrigerator and wait until the pressure in the system equalizes (2-3 hours).
2. Find the capillary tube (thin copper tube going from the compressor to the evaporator).
3. If it is hot at the inlet and cold at the outlet, then freon is not passing through - the tube clogged.

The blockage can only be cleared using special equipment (blowing with nitrogen or replacing the tube). This cannot be done at home.

7. Problems with electronics: control board and sensors

In modern refrigerators (for example, Samsung RL-60 or LG DoorCooling+) an electronic board is responsible for cooling. If it fails, malfunctions are possible:

• 📛 An error flashes on the display (for example, E1, FF or ER DS).
• 🔄 The compressor turns on chaotically, the temperature fluctuates.
• 🖥️ The refrigerator does not respond to settings from the control panel.

What to do:

1. Reset the settings to factory settings (usually you need to hold down the button Super Cool or Fridge Temp for 10 seconds).
2. Check the board contacts for oxidation or burning.
3. If the board is clearly damaged (darkened tracks, swollen capacitors), it needs to be reflashed or replaced.

⚠️ Attention: Do not try to solder the board yourself without experience - this may lead to a short circuit. Contact a service specializing in refrigerator electronics.

Frequently asked questions about repairing refrigerators

Is it possible to repair the refrigerator yourself if it is under warranty?

No. (disassembly, soldering, replacement of freon) will lead to loss of warranty. The exception is cleaning the condenser or replacing the light bulb. In other cases, first call an authorized technician.

How much does refilling freon cost?

The cost depends on the model of the refrigerator and the region. data-i="179">Leak diagnostics - 1000-1500 rubles.

• Leak diagnostics - 1000-1500 rubles.
• Refilling freon (without replacing tubes) - 2500-4000 rubles.
• Soldering tubes + refilling - 4000-6000 rubles.

For models with No Frost the price may be higher due to the complexity of the system.

Why does the refrigerator not freeze, but the light inside is on?

This is a typical sign of a malfunction of the thermostat, start relay or compressor. Check first:

1. The position of the thermostat knob (perhaps it is in the position Off).
2. Voltage in the socket (should be 220-230V).
3. Sound of the compressor (if it does not hum, the problem is in it or in the relay).

How often do you need to defrost refrigerator to avoid breakdowns?

For models with No Frost 1-2 times a year is enough. For conventional refrigerators - every 3-4 months. Regular defrosting prevents:

• Icing of the evaporator.
• Overload compressor.
• Corrosion of tubes (due to condensation).

Is it possible to turn on the refrigerator after transporting it lying down?

No! If the refrigerator was transported in a horizontal position, you need to wait 6-12 hours before turning it on. otherwise, when starting, a water hammer will occur and the compressor will fail.