The refrigerator does not cool: causes of failure and solutions

Have you opened the refrigerator, but instead of the usual chill you feel room temperature? The food spoils, there is condensation on the walls, and the motor runs non-stop or is completely silent? This problem is familiar to many owners of equipment - from old Samsung RL-33 to new Liebherr CN 4315. The reasons can be either trivial (forgot to close the door) or serious (compressor failure).

In 80% of cases, the malfunction can be diagnosed independently, without resorting to the services of a technician. In this article we will look at why the refrigerator stops cooling - from simple to complex. You will learn how to check the thermostat, why the back wall heats up, when freon is to blame, and what to do if the appliance hums but does not freeze. And for complex cases, we will provide a checklist for preparing for a specialist’s visit. all possible reasons, for which the refrigerator stops cooling - from simple to complex. You will learn how to check the thermostat, why the back wall heats up, when freon is to blame, and what to do if the appliance hums but does not freeze. And for complex cases, we will provide a checklist to prepare for a specialist’s visit.

Important: if the refrigerator is still under warranty, do not disassemble it yourself this may void the manufacturer’s obligations. First, contact the brand's service center (Indesit, Bosch, Atlant etc.) and clarify the conditions for free repair.

1. Violation of operating rules - when the user is to blame

Before you commit a breakdown, check whether you have violated the basic rules for using the equipment. Often the refrigerator does not cool due to external factors, rather than internal faults.

• 🚪 The door is not closed well. Even a small gap of 2–3 mm leads to the entry of warm air. Check the rubber seal - it could be deformed or dirty.
• ☀️ The equipment is located next to the heat source. The battery, stove, direct sunlight cause the compressor to wear out. Norm: distance to heating devices is at least 50 cm.
• 📦 Overload with products. If you fill the refrigerator to capacity, air circulation is disrupted. This is especially critical for models with a system No Frost.
• ❄️ Icing of the evaporator. In refrigerators with a drip system, ice on the back wall blocks heat exchange. Defrost the equipment at least once every 6 months.

Simple test: unplug the refrigerator for 10-12 hours (let it defrost completely), then turn it on again. If after this the temperature returned to normal, the problem was in operation, and not in breakdown.

2. Failure of the thermostat or thermostat

The thermostat (thermostat) is the “brain” of the refrigerator that controls the temperature. If it fails, the compressor either does not turn on at all, or works without stopping, but does not cool. Symptoms of malfunction:

• 🔄 The refrigerator does not turn off, the motor hums constantly.
• ❄️ It is too cold in the freezer (food is frozen), and in the main compartment warm.
• 💡 The light inside is on, but the compressor does not start.

How to check the thermostat yourself:

1. Unplug the refrigerator.
2. Remove the protective cover (usually located inside the chamber or on the top panel).
3. Find the thermostat - this is a small box with a tube attached to the evaporator.
4. Carefully remove the terminals and short them together (simulating the operation of the thermostat). If the compressor starts, the thermostat is faulty.

Where is the thermostat located in popular models?

In refrigerators Atlant i Birusa the thermostat is usually located on the right inside the chamber, under the plastic cover. B Samsung i LG with system No Frost - behind the back panel of the freezer. In older models ZIL i Minsk —on the top panel outside.

If the thermostat is broken, it needs to be replaced. The cost of a new part is from 800 to 2500 rubles, depending on the model. To replace, you will need a soldering iron (to attach the tube) and a screwdriver.

3. Compressor malfunction - when the motor does not pump freon

The compressor is the “heart” of the refrigerator, which pumps refrigerant (freon) through the system. If it fails, cooling stops completely. Symptoms:

• 🔇 The refrigerator does not make noise (the compressor does not start).
• 🔥 The compressor housing (the black “drum” at the back) is hot to the touch.
• 💥 When turned on, clicks are heard, but the motor does not start (protection is triggered).

Causes of compressor failure:

If the compressor does not start, but you hear clicking sounds, try “rock” it manually:

1. Unplug the refrigerator.
2. Wait 10 minutes.
3. Gently rotate the compressor by hand (it should rotate slightly).
4. Turn on the appliance again.

If this does not help, the compressor must be replaced. Check the warranty carefully: in some models (for example, Bosch KAN92VI30R) the compressor has an extended warranty of up to 10 years.

4. Freon leak - when the refrigerant has “left” the system

Freon is a gas that circulates through the refrigerator tubes and provides cooling. If a leak occurs, the compressor runs idle, and the temperature does not drop. Signs of a leak:

• 🕳️ The refrigerator runs without stopping, but does not freeze.
• 🧊 The condenser (grid at the back) remains cold.
• 🛠️ Oil stains are visible on the tubes or in the soldering areas (freon leaves along with the oil).

The most vulnerable places for leakage:

• 🔧 Places where the tubes are soldered (especially in old refrigerators).
• 🧊 Evaporator (if it is rusted or damaged during defrosting).
• 🔄 Capillary tube (may crack from vibration).

It is difficult to detect a leak on your own - you need a special leak detector or a soap solution (there will be bubbles in places of leakage). If you suspect this problem do not turn on the refrigerator - without freon, the compressor will quickly burn out.

What to do:

1. Turn off the refrigerator and defrost it.
2. Inspect the tubes for oil stains or corrosion.
3. If you find damage, call a technician. Independent soldering is fraught with repeated leakage.

5. Clogged capillary tube or filter drier

The capillary tube is a thin channel through which freon enters the evaporator. If it becomes clogged (for example, with oil or moisture particles), the refrigerant circulation is disrupted and the refrigerator stops cooling. Symptoms:

• ❄️ The freezer works, but the main chamber does not.
• 🔄 The compressor turns on for 5–10 seconds and turns off (protection is triggered).
• 🧊 The condenser (grid at the back) heats up unevenly (one part is hot, the other cold).

Causes of blockage:

• 🛢️ Moisture getting into the system (if the refrigerator has been turned off for a long time without vacuumization).
• 🔧 Poor quality repairs (poor soldering, dirty freon).
• 🧊 Destruction of the filter-drier (it clogs the tube with dust).

Diagnostics:

1. Turn off the refrigerator and touch the capacitor. If it is hot only at the beginning, and then cold, this is a sign of a blockage.
2. Shine a flashlight on the capillary tube (thin copper tube in front of the evaporator). If it is covered with frost, there is most likely a blockage.

The blockage can only be removed using special equipment (hydraulic press, nitrogen). Self-repair is impossible - a specialist is required.

Disconnect the refrigerator from the mains|Defreeze (if there is ice)|Give access to the back wall|Prepare documents (warranty card, passport)|Write down the model of the refrigerator (located on the sticker inside)

-->

6. Failure of the fan or No Frost system

In refrigerators with a system No Frost the fan is responsible for air circulation. If it breaks, the cold stops being distributed throughout the chambers. Signs:

• 🌬️ It’s cold in the freezer, but warm in the main compartment.
• 🔇 There is no characteristic fan noise (in normal mode it hums slightly).
• ❄️ Ice forms on the back wall of the freezer (the fan does not blow, moisture does not evaporate).

How to check the fan:

1. Turn off the refrigerator.
2. Remove the back panel of the freezer (usually attached to latches or screws).
3. Find a fan - it looks like a small turbine with blades.
4. Try to turn the blades by hand. If they do not spin or squeak, the fan is jammed.

Frequent causes of breakdown:

• 🧊 Icing of the blades (you need to defrost the refrigerator).
• 🔌 Malfunction of the fan motor (replacement required).
• 🕳️ Entry of foreign objects (for example, pieces of food).

If the fan does not work due to icing, defrost the refrigerator for 24 hours. If the problem is in the motor, it needs to be replaced (the cost of the part is 1500–3000 rubles).

7. Problems with electronics: control board, sensors, relays

Modern refrigerators (Samsung RB37J5240SA, LG GA-B489YVQZ) are equipped with electronic control boards that control all processes. If the board fails, the equipment may behave unpredictably: it may or may not cool, display errors on the display, or not turn on at all.

Symptoms of electronics failure:

• 📛 An error lights up on the display (for example, E1, F2, H1 —the decoding is in the instructions).
• 🔄 The refrigerator turns on/off spontaneously.
• 💡 The light inside is not on, but the compressor is working.

Frequent reasons:

• 🌊 Power surges (if the refrigerator is not connected via stabilizer).
• 💧 Moisture on the board (for example, during defrosting).
• 🕷️ Short circuit due to insects (ants, cockroaches can crawl into the electronics).

Diagnostics:

1. Check whether the power indicator on the control panel is on.
2. If there is an error on the display, find its explanation in the instructions (for example, E1 v Bosch is a problem with the temperature sensor).
3. Disconnect the refrigerator for 5 minutes, then turn it on again. If the error remains, the electronics are to blame.

Repairing the board will cost 2000–6000 rubles. In some cases, it can be reflashed, but more often replacement is required.

8. When to call a professional - checklist before a specialist’s visit

If you have checked all possible reasons, but the refrigerator still does not cool, it’s time to contact the professionals. To save time and money, prepare for the technician’s visit:

Write down the refrigerator model (on a sticker inside or on the back)|Prepare a warranty card and receipt|Get access to the back wall|Defreeze the refrigerator (if there is ice)|Take photos of errors on the display (if any)

-->

The cost of repairs depends on breakdowns:

If the refrigerator is under warranty Do not agree to repairs from unofficial services —this may void the warranty. Contact only authorized brand centers.

Warnings:

⚠️ Attention: If you suspect a freon leak, do not turn on the refrigerator - this may lead to compressor failure. Turn off the equipment and wait for the technician.

⚠️ Attention: When replacing the compressor or refilling freon, the technician must evacuate the system (remove moisture and air). If this is not done, a new breakdown will not be long in coming.

FAQ: Frequently asked questions about a non-working refrigerator

The refrigerator hums, but does not freeze - what is the reason?

The most likely reasons:

1. Freon leak (the compressor is idling).
2. Clogged capillary tube (freon does not circulate).
3. Thermostat failure (the compressor does not turn off, but no cold is produced).

First, check whether the refrigerator is overloaded with food and whether the door is tightly closed. If this does not help, call a specialist.

Is it possible to refill freon yourself?

Technically yes, but this requires:

• Special equipment (vacuum pump, pressure gauges, cylinder with freon).
• Experience soldering of copper pipes.
• Knowledge of the type of freon (in old models - R12, in new ones - R134a or R600a).

Without skills, you risk damaging the system or getting freon poisoning. It is better to entrust this to professionals.

Why does the refrigerator not cool, but the freezer works?

This is a typical problem for two-chamber refrigerators. Reasons:

• Fan failure (in models with No Frost).
• Drain hole clogged (water does not drain, ice forms).
• Failure of the damper between the chambers (in refrigerators with one compressor).
• Freon leak in the circuit of the main chamber.

First defrost the refrigerator for 12 hours. If that doesn’t help, check the fan and damper.

How much does the repair cost? refrigerator at home?

The cost depends on the breakdown and the region:

• Diagnostics - 500-1000 rubles (sometimes free if you order repairs).
• Replacement of the thermostat - 1500-3000 rubles (with detail).
• Compressor repair - 5000-12000 rubles.
• Freon refilling - 2500-5000 rubles.

In Moscow and St. Petersburg, prices are 20-30% higher than in the regions. (Samsung, LG) repairs will cost more, but there will be a guarantee.

What to do if the refrigerator does not cool after moving?

After transportation, the refrigerator must be connected correctly:

1. Let it stand for 4-6 hours (so that the oil in the compressor drains down).
2. Check whether the condenser tubes (at the back) are bent.
3. Make sure that the plug is tightly inserted into the socket (sometimes after moving the contacts oxidize).
4. If the refrigerator does not turn on, check the fuse in the plug.

If after these steps the equipment does not work, there may be damage to the compressor or a freon leak due to shaking.