The refrigerator does not cool: 7 possible breakdowns and how to recognize them

Have you opened the refrigerator door, but instead of the usual cold air you feel room temperature? The food is spoiling, condensation has appeared on the walls of the chamber, and the motor is running non-stop or, on the contrary, is silent like a partisan? Don’t rush to panic - in 80% of cases the problem is solvable, and does not always require calling a technician.

When the refrigerator compartment stops cooling, this can be the result of either a simple malfunction (for example, a clogged filter or a malfunction in the electronics), or a serious breakdown (compressor failure or freon leak). In this article we will analyze why the refrigerator has stopped freezing, and also provide a checklist for self-diagnosis. You will find out when you can cope on your own, and when it is better to immediately call a specialist so as not to worsen the situation. all possible reasonswhy the refrigerator has stopped freezing, and we will also provide a checklist for self-diagnosis. You will learn when you can cope on your own, and when it is better to immediately call a specialist so as not to worsen the situation.

1. The thermostat (temperature regulator) is the first suspected part

If the refrigerator is turns on, but does not cool, the thermostat is often the culprit. This part is responsible for temperature control: when the chamber becomes too warm, it sends a signal to the compressor to start. If the thermostat breaks down, the motor either does not receive a command to work, or works without stopping, but no cooling occurs.

How to check the thermostat yourself:

• 🔧 Unplug the refrigerator and remove all food.
• 🔍 Find thermostat (usually it is located next to the lighting lamp or on the back wall of the chamber).
• 📊 Move the thermostat knob to the "Max" or "Super Freeze" position - if the compressor does not start after 5-10 minutes, the part is faulty.
• 🔌 For an accurate check, you can close the thermostat contacts directly (only if you have experience working with electricity!). If after this the compressor starts working, the thermostat must be replaced.

In models with electronic control (for example, Samsung RB37J5240SA or LG GA-B489YGQZ) a temperature sensor is used instead of a mechanical thermostat. Its breakdown manifests itself in the same way: the compressor does not respond to temperature changes or operates chaotically. In this case, you cannot do without diagnostics with a multimeter.

⚠️ Attention: Do not try to disassemble the electronic control unit without a diagram! Incorrect connection of contacts can damage the entire board.

2. Compressor: the heart of the refrigerator, which can “get sick”

A compressor is a “pump” that pumps freon through the system, providing cooling. If it does not turn on at all, the problem may be:

• 🔌 Broken winding (motor hums, but does not start).
• 🔋 Malfunction of the starting relay (clicks, but the compressor does not starts).
• 🛠️ The piston is jammed (the engine tries to start, but immediately turns off with a loud knock).

How to diagnose:

1. Listen to the compressor: if it is buzzes, but does not start there may be a problem with the start relay. If is completely silent — winding breakage or thermostat malfunction.
2. Touch the compressor housing (be careful, it may be hot!): if it heats up to 70-90°C and turns off after 1-2 minutes, this is a sign of an interturn short circuit.
3. Check the starting relay: remove it and shake it - if you hear a knock, this is a sign of a malfunction.

B refrigerators No Frost (for example Indesit DF 5200 W or Bosch KGN39XL40R) the compressor may overheat due to dirty condenser (grids on the back wall). Dust and pet hair impair heat transfer, causing the motor to wear out. The solution is simple: turn off the refrigerator and vacuum the condenser.

3. Freon leak - when the refrigerator “loses blood”

Freon is a refrigerant that circulates through the system and removes heat. If a microcrack appears somewhere (most often in evaporator or condenser), the gas gradually evaporates and the refrigerator stops cooling. Signs of a leak:

• ❄️ The compressor runs non-stop, but there is no cold.
• 💧 Ice appears on the back wall of the chamber (in models with drip system).
• 🔍 Oil stains are visible on the tubes or in soldering areas.

What to do:

It is impossible to eliminate the leak on your own - it is required special equipment for soldering and refilling freon. However, you can check:

• 🔦 Inspect evaporator (the plastic box inside the chamber) for corrosion. In refrigerators Atlant or Stinol this is a weak point - over time, the metal rusts and freon comes out through the holes.
• 📏 Check solder places on the back wall: if there is a green coating there (copper oxidation), most likely it is leaking there.

⚠️ Attention: If the leak occurred in the foamed part of the case (for example, in two-chamber refrigerators with a bottom freezer), repairs may be unprofitable - you will have to open the polyurethane foam, which often leads to loss of thermal insulation.

4. A clogged capillary tube is a “thrombus” in the cooling system.

The capillary tube is a thin channel through which freon enters the evaporator. Over time, it may become clogged wet dirt, oxides or pieces of filter drier. As a result, the refrigerant does not circulate and the refrigerator stops cooling, although the compressor is running.

Signs of a blockage:

• 🔄 The compressor runs without stopping, but the condenser (grid at the back) remains cold.
• 🧊 Ice may form in the freezer, and heat in the refrigerator.
• 💡 The light inside is on, the fan (in models No Frost) is spinning, but there is no cold.

This problem cannot be eliminated at home - requires professional purging of the system with nitrogen and replacement of the filter-drier. However, you can prevent blockage if:

• 🔄 Turn off the refrigerator once a year and let it thaw (even if it has No Frost).
• 🧹 Regularly clean the condenser from dust.
• 🚫 Do not store open containers with liquids in the refrigerator, which can evaporate and settle on parts.

5. Fan failure in No Frost systems

In refrigerators with a system No Frost (for example, Samsung RL-44 QEBS or Liebherr CN 4015) the fan is responsible for circulating cold air. If it breaks, the refrigerator compartment stops cooling, although the freezer may continue to work.

How to understand that the fan is to blame:

• 🌀 When the door is open, you cannot hear the noise of the fan running.
• 🧊 Too much ice forms in the freezer compartment (fan does not distribute cold).
• 🔍 Mechanical damage to the blades is visible (for example, if the refrigerator was transported lying down).

To check the fan:

1. Unplug the refrigerator.
2. Remove the back panel in the refrigerator compartment (usually it is attached on latches or screws).
3. Try to turn the fan blades by hand - if they do not rotate or cling to the body, the part must be replaced.
4. Check the fan power supply with a multimeter (should be 12 or 24 V depending on the model).

In 30% of cases the fan stops working due to icing of the blades. This happens if:

• 🚪 The refrigerator door does not close well (the seal is worn out).
• 💧 Moisture gets into the chamber (for example, due to open containers with liquid).
• 🛠️ The defrost heater is faulty (in models with Full No Frost).

What to do if the fan is frozen?

Turn off the refrigerator for 12-24 hours so that the ice melts. After turning it on, check if the fan is spinning. If the problem persists, look for the cause in the door seal or system defrosting.

6. Malfunction of the electronic control unit

In modern refrigerators (for example, Bosch KAN92VI30R or Electrolux ENN2853AOW) the electronic board is responsible for the operation of all systems. If it fails, the refrigerator can:

• 🔄 Turn on and turn off immediately.
• 📛 Show errors on the display (for example, E1, F2 or H1).
• 🧊 Work in one mode (for example, only freeze or only cool).

Causes of board failure:

• ⚡ Power surges in the network (especially important for houses with old wiring).
• 💧 Moisture ingress (for example, if the refrigerator was in a damp room).
• 🛠️ Defective radio components (found in budget models).

It is difficult to repair the board yourself, but you can:

• 🔌 Check the power: turn off the refrigerator for 5 minutes, then turn it on again - sometimes this clears errors.
• 🔍 Inspect the board for signs blackened or swollen elements (capacitors, resistors).
• 📋 Write down the error code and look for its explanation in the instructions or on the network (for example, error E4 in Samsung often means a problem with temperature sensor).

⚠️ Attention: If the board fails due to a power surge, install voltage stabilizer before replacing - otherwise the new board may burn out again.

7. Problems with the door seal - when the cold “leaks away”

If the sealing rubber is on The refrigerator door is worn out or deformed, warm air penetrates inside the chamber. The compressor tries to compensate for the loss of cold, working without stopping, but the temperature still does not drop to the desired level.

How to check the seal:

1. Close the door and try to insert it between it and the body sheet of paperIf. it falls out or goes through too easily - the seal is not airtight.
2. Inspect the rubber band for cracks, tears or deformation.
3. Check if the seal does not come away from the door (sometimes it just falls out from the groove).

In most cases, the seal can be restored or replaced:

• 🧼 If the rubber is dirty, wash it with warm water and soap and dry.
• 🔥 If the seal is deformed - try to restore the shape with a hairdryer (heat it to 60–70°C and give the desired shape).
• 🛠️ If the elastic band is torn, replace it with a new one (select according to the refrigerator model).

In refrigerators with magnetic seal (for example, Beko CNK 335120) the magnetic field weakens over time. In this case, only replacement will help.

FAQ: Frequently asked questions about the refrigerator compartment not working

The refrigerator does not cool, but the freezer compartment works normally. reason?

Most likely, the problem is in the cold distribution system:

• In single-compressor refrigerators (for example, Indesit BIAA 13) this could be capillary tube clogged or magnetic valve malfunctionwhich switches the cold between chambers.
• B two-compressor (for example, Liebherr CNef 4815) - failure of the refrigeration chamber compressor or freon leak in its circuit.

Also check fan (in models No Frost) and door seal refrigerator compartment.

The compressor runs without stopping, but the refrigerator does not It’s freezing. What should I do?

This is a sign of one of three problems:

1. Freon leak —the compressor is trying to get cold, but the refrigerant has left the system.
2. The capillary tube is clogged —freon does not circulate and there is no cooling. occurs.
3. Thermostat malfunction —the compressor does not receive a signal to shut down.

You can only check the thermostat yourself (close the contacts). Other problems require a professional. repair.

The refrigerator began to cool poorly after moving. What's the matter?

Probable reasons:

• 🚛 Damage compressor — if the refrigerator was transported lying down or at a large angle, the piston could jam.
• 🌀 Displacement of tubes —during shaking, contacts could come loose or copper tubes could be bent, which leads to freon leakage.
• 🔌 Failure electronics —if the refrigerator was immediately turned on after moving, a power surge could occur.

Solution: turn off the refrigerator for 12-24 hours so that the oil in the compressor flows down. If after turning on the problem remains, call a specialist.

Is it possible to repair a refrigerator that is older than 15 years?

It depends on type breakdown and cost of repair:

• ✅ If it breaks thermostat, seal or fan —repair is advisable (cost 1,500–4,000 ₽).
• ⚠️ If required replacement of the compressor or refilling freon —evaluate the profitability: repairs can cost 50–70% of the cost of a new refrigerator.
• ❌ If it fails electronic board in older models (before 2010), find spare parts can be difficult, and repairs may not be justified.

Tip: compare the cost of repairs with the cost of a new class refrigerator A+++ - modern models consume 2-3 times less electricity, which will pay off the difference in price in 3-5 years.

How to extend the life of a refrigerator after repair?

To avoid repeated breakdowns:

• 🔌 Use voltage stabilizer (especially if there are frequent surges in your area).
• 🧹 Once every six months, clean the condenser (grid at the back) from dust.
• 🚪 Keep an eye on door seal - wipe it and check tightness.
• ❄️ Do not put in the refrigerator hot foods - this increases the load on the compressor.
• 💧 Defrost the refrigerator regularly (even if it has No Frost) to avoid icing of the fan.