Why the temperature in the refrigerator does not decrease: a complete analysis of the reasons and solutions

Do you open the refrigerator, but the food is warm, there is condensation on the walls, and the motor works without stopping - or, conversely, is silent like a guerrilla? The situation is familiar, but not hopeless. Increased temperature in the chamber is one of the most common malfunctions encountered by owners of refrigerators Atlant, Samsung, Indesit and other brands. In 60% of cases, the problem can be fixed on your own, without resorting to expensive repairs.

In this article we will look at why the refrigerator stopped cooling - from trivial all possible causeswhy the refrigerator stopped cooling - from the banal a door not tightly closed to serious breakdowns compressor or electronic unit. You will learn how to carry out diagnostics at home, what manipulations are safe for equipment, and when it is better to immediately call a specialist. We will pay special attention models of refrigerator behavior in case of specific malfunctions - this will help more accurately determine the root of the problem.

Spoiler: if your refrigerator No Frost suddenly “refuses” to freeze, and the freezer is still cold, it is most likely fan or defrost timerto blame. In older models with a “crying” evaporator, it most often becomes clogged capillary tube or fails thermostat. But first things first.

1. Heat transfer disturbance: why the refrigerator does not cool, but the freezer works

If the freezer is functioning normally, and the temperature in the main compartment is increased, the problem lies in refrigerant circulation system or ventilation. In 90% of cases, the following are to blame:

• 🔌 Clogged capillary tubes - small particles of oil or moisture block the flow of freon, and it does not enter the evaporator of the refrigeration chamber.
• 🌀 No Frost fan malfunction — if the blades do not rotate, cold air is not distributed throughout the chamber (relevant for models Samsung RL38*, LG GA-B489*).
• ❄️ Evaporator freezing —ice blocks heat exchange and the compressor runs “idle” (typical for Atlant MXM-180*).
• 🔄 Valve failure switching —in two-compressor models (Liebherr CN*) the valve may “stick” in the “freezer” position.

How to check? Open the freezer and listen: if you hear the noise of the fan, but the cold does not go into the main chamber - the problem is air duct or damper. If the freezer is also not freezing well, the problem is freon or compressor.

⚠️ Attention: if the refrigerator No Frost suddenly began to “cry” (on frost appears on the back wall), this is a sign malfunction of the defrosting system. Do not try to break off the ice with a knife - you risk damaging the evaporator!

2. Problems with the compressor: when the motor works, but does not cool.

The compressor is the “heart” of the refrigerator. If it hums, but does not create pressure, or not at all. turns onthe temperature in the chambers will inevitably rise. Common symptoms:

• 🔊 The engine runs without stopping, but there is no cold - wear of the piston group or freon leak.
• 🛑 The compressor does not start, the relay clicks are heard - turn-to-turn short circuit or failure of the starting capacitor.
• 🔥 The compressor housing is hot, but the refrigerator does not freeze - overheating due to high load (typical for Indesit BIAA 13* when the capillary is clogged).

How to diagnose? Disconnect the refrigerator from the network for 10 minutes, then turn it on again If the compressor:

• ✅ It started up and turned off after 5-10 minutes - the problem may be in thermostat or sensor.
• ❌ Does not start at all - check relay (a common problem in Beko CN*).
• ⚠️ It works, but does not turn off - freon leak or clogging filter-drier.

To check the compressor with a multimeter:

1. Disconnect the refrigerator from the mains.
2. Remove the starting relay (usually attached to the compressor).
3. Measure the resistance between the contacts: between C (common) and S (starting winding) should be ~20-40 Ohm, between C and R (working winding) - ~10-20 Ohm.

⚠️ Attention: if the resistance between any contacts is equal to 0 Ohm (short circuit) or ∞ (open circuit), the compressor must be replaced. Do not risk turning it on - this may lead to fire!

3. Malfunctions of the thermostat and electronic control unit

If the compressor is working, but the refrigerator does not cool, the culprit may be thermostat (in mechanical models) or electronic module (in modern refrigerators with a display). Signs:

• 📉 The temperature in the chamber drops to minus values, then rises sharply - sensor malfunction (typical for Samsung RB-30 J3200*).
• 🔄 The refrigerator turns on for 1-2 minutes and turns off - false thermostat signals.
• 🖥️ An error flashes on the display (for example, E1, F2) - failure in control board.

How to check the thermostat:

1. Find the thermostat (usually located next to the light bulb).
2. Remove the protective cover and find two wires, going to the thermostat.
3. Short them together (jumper). If the compressor starts, the thermostat is faulty.

For refrigerators with electronic control (LG DoorCooling+, Bosch VitaFresh):

• Try reset settings (turn off for 10 minutes, then turn on).
• If there is an error on the display, check its code with instructions (for example, E4 in Atlant —a problem with the evaporator sensor).

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

Freon is a refrigerant that circulates through the system and provides cooling. If it is leaked, the refrigerator will stop freezing, even if the compressor is running. Signs of a leak:

• 🕳️ On the back wall of the refrigerator (near the compressor) you can see oil stains - freon escapes through microcracks.
• ❄️ The evaporator is not covered with frost, although the compressor is running.
• 🔥 The condenser tube (grid at the back) does not heat up.

The most vulnerable places for leakage:

1. Locking connections (solder points tubes).
2. Evaporator —metal corrosion due to condensation.
3. Filter drier —may crack from vibration.

What to do? Freon leak impossible to eliminate on your own - required:

1. Detect the location of the leak (using leak detector or soap solution).
2. Repair the damage (soldering, replacing the tube).
3. Evacuate the system and fill in new freon.

⚠️ Attention: if the leak occurs in foamed part (for example, in the wall of the refrigerator), repairs will cost more - you will have to open the case and replace the evaporator. In such cases, it is cheaper to buy a new refrigerator.

How to temporarily “reanimate” a refrigerator if there is a freon leak?

If the repairman arrives only in a few days, and the food cannot be left without refrigeration, you can try the following trick:

1. Unplug the refrigerator.

2. Thaw it completely (at least 12 hours).

3. Turn it on again - sometimes the residual freon is enough for 1-2 days of operation in gentle mode.

⚠️ This is a temporary solution! You cannot operate the refrigerator in this condition for a long time - the compressor will quickly fail.

5. Clogged capillary tube: symptoms and cleaning methods

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

• 🔄 The compressor works non-stop, but there is no cold.
• ❄️ The condenser (grid at the back) is hot only in one place (where freon does not pass).
• 💧 Ice may form on the tubes in the freezer ice on the tubes.

How to clean the capillary tube?

Method 1: Nitrogen purging (requires special equipment).

Method 2: Hydraulic flushing (solvent is used, for example, R141b).

Method 3: Replacing the capillary (if the blockage is not cleared).

At home you can try knock on the phone (carefully!) at the site of the suspected blockage - sometimes this helps to move the blockage.

6. Problems with the seal and doors: when the cold “leaks away”

If the refrigerator does not cool well, but the compressor and freezer are working normally, check tightness of the chamberEven a small gap in the seal or. a skewed door leads to:

• 🔥 Constant operation of the compressor (it cannot reach the desired temperature).
• ❄️ Formation of condensation on the walls and products.
• 💰 Increased energy consumption (up to 30%!).

How to check the seal?

1. Close the door and run your hand along the rubber - if you feel cold airthe seal is letting in.
2. Place a sheet of paper between the door and the body. If it falls out the seal is broken.
3. Inspect the rubber for cracks, tears or deformations..

How to remove:

• 🧼 Clean the seal from dirt and grease (use soap solution).
• 🔥 Rub the rubber with silicone lubricant (sold in car dealerships) - this will restore elasticity.
• 🔧 Adjust the hinges —if the door is sagging, tighten the screws.
• 🛒 Replace seal (cost - from 1,000 to 3,000 rubles depending on the model).

For models with No Frost (Samsung RB-37 J5*, LG GA-B429*), also check the tightness of the internal damper between the chambers - its deformation leads to cold leakage.

7. Breakdowns of the No Frost system: fan, heating element, timer

Refrigerators with the system No Frost (Indesit NF 5201*, Beko CNK 335120*) require special attention. If the temperature in the chamber is elevated, but the freezer is working, check:

• 🌀 Fan - if it does not rotate, the cold is not distributed throughout the chamber. Reasons: freezing of the blades, motor failure, broken wiring.
• 🔥 Defrost heating element - if it burns out, the evaporator becomes covered with ice and the fan is blocked.
• ⏱️ Defrost timer - if it is “stuck”, the system does not switch to defrost mode.
• 📡 Defrost sensor - if there is a malfunction, the heating element does not turn on, and ice builds up.

How to diagnose:

1. Turn off the refrigerator and defrost it for 12 hours.
2. After turning it on, listen: if the fan does not make noise it does not work.
3. Check the heating element with a multimeter: the resistance should be ~20-60 Ohm (for Atlant — ~30 Ohm, for Samsung — ~50 Ohm).

If the problem is defrosting timer, it can be temporarily replaced with a universal one (for example, Defrost Timer KIX-8), but it is better to install original part.

⚠️ Attention: in refrigerators No Frost it is strictly forbidden to chip off the ice with a knife or other sharp objects! This will lead to damage to the evaporator and freon leakage.

What to do if the refrigerator does not cool: step-by-step algorithm

In order not to waste time on guessing, follow this plan:

1. Check the power: make sure that the refrigerator is connected to socket, there are no power outages.
2. Inspect the seal: close the door and check the tightness with a sheet of paper.
3. Listen to the compressor:
   • If does not turn on —the problem is in the relay, thermostat or board.
   • If works, but does not turn off —freon leak or capillary blockage.

Check the No Frost fan (if any): when the door is open, it should stop.

Defrost the refrigerator for 12-24 hours. If after turning it on, the problem is in the defrosting system.

Inspect the condenser (grid at the back): if it cold —there is no freon circulation.

If after all the manipulations the refrigerator does not cool, call a technician. Average repair cost:

FAQ: Frequently asked questions about refrigerator malfunctions

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

Start with the simplest:

1. Make sure that the door is tightly closed the seal is not damaged.
2. Check whether not overloaded the chamber is filled with food (especially at the back wall).
3. Listen is the compressor working (should hum quietly).
4. If the compressor is working, but there is no cold, most likely freon leak or capillary blockage.

Is it possible to fill the refrigerator with freon yourself?

Theoretically yes, but in practice it is dangerous and ineffective without special equipment. For refueling you need:

• Vacuum pump (for pumping moisture out of the system).
• Gauge manifold (for pressure control).
• Leak detector (to find the location of the leak).
• Cylinder with freon (for example, R134a or R600a, depending on the model).

Without evacuation of the system, the new freon will quickly lose its properties, and the problem will return. freon is explosive upon contact with an open flame!

Why did the No Frost refrigerator stop cooling, but the freezer works?

In 95% of cases, the fault is:

1. Fan - if it does not rotate, the cold does not enters the main chamber. Check to see if ice is blocking it.
2. The damper between the chambers - if it is closed, cold air does not pass through.
3. Temperature sensor - if it is lying, the compressor does not turn on cooling.

Defrost the refrigerator for 12 hours. If after turning on the fan does not work, replacement is required.

How long can you operate a refrigerator with a faulty thermostat?

If the thermostat stuck in the "on" position, the compressor will work without stopping, which will lead to:

• Overheating and breakage compressor (after 1-2 weeks of continuous operation).
• Evaporator freezing and No Frost system breakdown.
• Increased power consumption (up to 50%!).

Maximum - 2-3 daysuntil it arrives master. It’s not worth the risk for longer.

How often do you need to defrost a No Frost refrigerator?

Manufacturers claim that No Frost does not require defrosting, but this is not entirely true. data-i="394">— for cleaning from dust and bacteria.

• 🧊 1 time every 6-12 months - for cleaning from dust and bacteria.
• ❄️ If ice appears on the back wall - urgent defrost (this is a sign of malfunction).
• 🔄 After defrosting, let the refrigerator stand 1-2 hours with the door open so that the moisture evaporates.

Ignoring defrosting leads to fan failure and compressor overheating.