The refrigerator works, but does not cool - reasons and solutions

Have you noticed that the refrigerator is humming as usual, the light inside is on, but the food has stopped cooling? This problem occurs in 30% of owners of equipment older than 5 years - and does not always require calling a specialist. In half of the cases, the malfunction can be fixed on your own in 10-30 minutes if you correctly determine the cause.

In this article we will look at why the refrigerator works, but does not freeze - from banal all possible causesaccording to which the refrigerator works, but does not freeze - from the banal clogged capillary tube to serious compressor breakdowns. You will learn how to check the thermostat, sensors and freon circulation system without special tools, as well as when exactly it’s time to call a specialist. We will pay special attention to models with the No Frost system - 70% of their malfunctions are related to the fan and evaporator.

Let's start with the simplest reasons that you can eliminate right now - perhaps the problem can be solved by simply rebooting or cleaning the condenser.

1. Checking obvious reasons (5 minutes)

Before disassembling the refrigerator, eliminate external factors that may affect its operation. These checks will take no more than 5 minutes and do not require tools.

• 🔌 Power and socket: Make sure that the refrigerator is connected to a working outlet. Try plugging in another device (for example, a phone charger). If the socket does not work, check the machine in the panel.
• ❄️ Defrost mode: Some models (Samsung RL34, LG GA-B489) have a forced defrost button. Make sure that it is not pressed accidentally.
• 🌡️ Room temperature: If the room is hotter than +30°C, the compressor may not cope. Normal operation is guaranteed at +16...+32°C.
• 🚪 Door closure tightness: Check the sealing rubber - if it is torn or deformed, warm air penetrates inside. Carry out a test with a sheet of paper: it should press tightly against the door seal.

If everything is in order, but the refrigerator still does not cool, proceed to diagnosing the internal systems. At this stage, you will already need to disconnect the equipment from the network and partially disassemble it.

2. Malfunctions of the thermostat and temperature sensors

The thermostat (or thermostat) is the “brain” of the refrigerator, which controls the activation of the compressor. If it breaks, the compressor may work continuously or, conversely, not turn on at all. In modern models (Bosch KGE36, Atlant MXM 170), instead of a mechanical thermostat, electronic sensors are used, but the operating principle is similar.

Signs of a thermostat malfunction:

• 🔊 The compressor works without stopping, but it is cold no.
• 🥶 There is ice in the freezer, but heat in the main compartment (or vice versa).
• 🔄 The refrigerator turns off and turns on spontaneously.

How to check the thermostat:

1. Unplug the refrigerator.
2. Remove the protective casing (usually it is located inside the chamber or on the back wall).
3. Find the thermostat - this is a small box with a tube attached to the evaporator.
4. Carefully remove the terminals and check the resistance with a multimeter. At room temperature it should be 0 Ohm (closed), when cooling the tube with ice - 1 Ohm (open).

If the thermostat does not respond to temperature changes - it needs to be replaced. For models Indesit and Ariston a universal thermostat is suitable K59-L2433, for Samsung — DA61-01447A.

⚠️ Attention: In refrigerators with electronic control (LG DoorCooling+, Samsung Twin Cooling) a control board is used instead of a thermostat. Its diagnostics require special equipment - do not try to repair it yourself!

3. Problems with the compressor: why it works but does not freeze

The compressor is the “heart” of the refrigerator, which pumps freon through the system. If it is working, but there is no cold, the problem may be:

• 🔧 Interturn short circuit (the compressor hums, but does not create pressure).
• 🛢️ Leakage freon (the tubes are intact, but there is not enough gas).
• 🔌 Faulty start relay (the compressor turns on and immediately turns off).

How to check the compressor:

1. Turn off the refrigerator and wait 10 minutes.
2. Remove the back cover (on some models - the bottom panel).
3. Find the compressor - this is a black “barrel” with tubes.
4. Check the resistance of the windings with a multimeter:
   • Between C (common) and S (start) — 20-40 Ohm.
   • Between C and R (run) — 10-20 Ohm.
   • Between S i R — 30-50 Ohm.

If the readings are very different, the compressor is faulty. Also pay attention to start relay (small box on the compressor). If it gets hot or smells burning, it needs to be replaced.

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

Freon is a refrigerant that circulates through the system and provides cooling. If it leaks, the compressor is running idle. Signs of a leak:

• 🔊 The compressor runs non-stop, but there is no cold.
• 🧊 The condenser (grid on the back wall) does not heat up.
• 🛠️ Oil stains are visible on the tubes or in the soldering areas.

It is impossible to refill freon yourself - this requires special equipment. But you can detect the leak.:

1. Turn off the refrigerator and defrost it.
2. Inspect all solders and tubes for traces of oil (freon comes out along with the oil).
3. Pay attention to capillary tube —it often clogs or cracks.

If you find a leak, temporarily seal it with epoxy resin (for diagnostics only!). But remember: full repair includes soldering, vacuuming the system and refilling freon - this is a job for a master.

⚠️ Attention: Freon is non-toxic, but in high concentrations it can cause suffocation. If you smell a chemical smell, ventilate the room and do not turn on the refrigerator until the leak is eliminated!

What will happen if you do not eliminate the freon leak?

Without refrigerant, the compressor wears out and can burn out in 1-2 weeks. Also, oil from the system will enter the capillary tube, which will complicate repairs.

5. Problems with the No Frost system: fan and evaporator

Refrigerators with the system No Frost (Samsung RB, LG GA-B, Bosch KAN92**) have additional components: fan, evaporator and defrost timer. If at least one of them breaks, the refrigerator will stop cooling.

Typical faults of No Frost:

• 🌀 Stuck fan: if it does not spin, the cold does not enter the chambers. Check if it is blocked by ice or foreign objects.
• ❄️ Iced evaporator: if the defrost timer is broken, the evaporator becomes covered in ice and stops working.
• ⏱️ Faulty defroster: heating the element that melts the ice may burn out.

How to check the fan:

1. Unplug the refrigerator and defrost it.
2. Remove the back panel in the freezer (usually it is attached to latches).
3. Check whether the fan rotates freely. If not, clear it of ice or replace it.
4. Connect the refrigerator and see if the fan spins during operation. If not, check the power supply with a multimeter.

If the problem is in the defrost timer or defroster, they need to be replaced. For models Samsung a timer is suitable DA47-10001B, for LG — 6871JB1006A.

6. Capillary tube clogged: how to clean the system

The capillary tube is a thin channel through which freon enters the evaporator. Over time, it may become clogged due to:

• 🛢️ Oil deposits (if the oil has decomposed).
• 🔥 Oxidation (in systems older than 10 years).
• 🧊 Moisture (if the system has been improperly filled).

Signs of a blockage:

• The compressor is working, but the condenser (grid at the back) is cold.
• There is a slight frost in the freezer, but it is warm in the main compartment.
• Frost is visible on the tubes only in a small area.

You can clean the capillary tube at home nitrogen flush only this is done in service centers. But you can try temporary solution:

1. Unplug the refrigerator and defrost it.
2. Remove the back panel and locate the capillary tube (thin copper tube going to evaporator).
3. Gently warm it up with a hair dryer (not higher than +150°C) for 5-10 minutes. Sometimes this helps to dissolve deposits.

If cleaning does not help, you will need to replace the capillary tube or the entire evaporator unit.

7. Malfunctions of electronic control boards

In modern refrigerators (Samsung Family Hub, LG InstaView, Bosch Home Connect), an electronic board is responsible for cooling. If it fails, the compressor may not work correctly or not turn on at all.

Signs of a board malfunction:

• 📛 An error flashes on the display (for example, E1, FF, dH).
• 🔄 The refrigerator reboots spontaneously.
• 🔊 The compressor turns on for a few seconds and turns off.

It is almost impossible to repair the board yourself - you need soldering equipment and a circuit. But you can:

1. Turn off the refrigerator for 10 minutes (sometimes a reset helps).
2. Check the power supply to the board. multimeter (should be 12V or 24V depending on the model).
3. Inspect the board for burnt elements (blackened or swollen parts).

If the board is faulty, it needs to be replaced. For refrigerators Samsung suitable board DA97-10489Afor LG — 6871W1M002H.

⚠️ Attention: Details of electronic boards may differ even within the same model! Before purchasing, take a photo of the old board and show the photo to the seller.

8. When to call a technician: 5 signs. serious breakdown

Not all faults can be eliminated on your own. Call a specialist if:

• 🔧 The compressor does not start, although there is power.
• 🧊 Oil stains appear on the back wall of the refrigerator (leakage freon).
• ⚡ Burnt elements are visible on the control board.
• 🛠️ After cleaning the capillary tube, the problem remained.
• 📛 The refrigerator shows an error that cannot be reset.

The cost of repair depends on the malfunction:

Before the technician's visit required:

• Defreeze the refrigerator.
• Prepare access to the back wall (move away from the wall).
• Write down the model of the refrigerator (located on the sticker inside or on the back).

FAQ: Frequently asked questions about non-working cooling

❓ The refrigerator works, but does not freeze - what to check first?

Start with the obvious: check if the door is tightly closed, if the defrost mode is on, and if the outlet is working. Then inspect the compressor - if it is hot, but does not pump out cold, there may be a problem. be in the thermostat or a freon leak.

❓ Is it possible to refill freon yourself?

No. To refill freon you need special equipment (pressure gauge, vacuum pump) and a certificate for working with refrigerants. Self-refilling is hazardous to health and can lead to compressor failure.

❓ Why does the No Frost refrigerator not cool, but the fan works?

Probably the problem is in the frozen evaporator. Turn off the refrigerator for 12-24 hours so that the ice melts. If after turning on the problem remains, the defrost heater or timer is faulty.

❓ How much does the repair cost? if the refrigerator is humming, but not freezing?

The cost depends on the reason:

• Replacing the thermostat - 1,500–3,000 ₽.
• Refilling freon - 2,500–5,000 ₽.
• Repair of the control board - 2,000–6,000 ₽.
• Replacement of the compressor - 5,000–10,000 ₽.

The technician will tell you the exact price after diagnostics.

❓ Can I use refrigerator, if it does not cool?

No. If the compressor works, but there is no cold, this means that it is running idle and may burn out in a few hours. Unplug the refrigerator and do not turn it on until the problem is resolved.