The situation when the refrigerator has stopped freezing always takes you by surprise and requires immediate intervention. It may still be cool in the chamber, but the food is already beginning to melt, and the frost on the walls has disappeared. The first step is to understand the scale of the problem: this is a temporary failure in the electronics or a serious breakdown of the compressor that requires professional intervention.
Many owners of household appliances immediately begin to panic and look for a service center number, but often the problem can be solved independently. Fault diagnosis This is the first and most important stage, which will save time and money. In this article, we will analyze the main reasons why the unit stopped gaining cold, and we will give clear instructions for eliminating them.
It is important to understand that modern models, be it Indesit, Atlant or LG, have their own design features. However, the basic principles of operation of the refrigeration circuit remain the same for most devices. If you notice that the equipment is humming but not cooling, or, conversely, is silent and does not turn on, do not rush to conclusions - check all possible options one by one.
Primary diagnosis: why the cooling does not work
Before disassembling the unit or looking for tools, it is necessary to conduct a visual inspection and a basic check. Often the reason is trivial and lies in violation of operating rules or an external factor. Lack of cold may be caused by the door not being closed tightly, or too much warm food accumulated in the chamber.
Pay attention to the nature of the motor operation. If the compressor hums but does not start, or operates cyclically with short intervals, this indicates certain groups of faults. At the same time, complete silence when the equipment is plugged in indicates a problem with the power supply or the starting relay.
⚠️ Attention! If you smell a strong burning smell, see sparking, or hear a loud bang, immediately unplug the appliance. Further self-diagnosis in this case is life-threatening.
Check the temperature. Perhaps the regulator was accidentally knocked down or the fast freezing mode was activated, which then did not turn off. It is also worth assessing the tightness of the sealing rubber around the perimeter of the door. If the rubber worn out or is dirty, the cold air simply evaporates out, and the refrigerator cannot reach the desired temperature.
For a more accurate understanding of the condition of the equipment, you can use an interactive survey that will help narrow down the search for the problem.
Problems with power supply and thermostat
One of the most common reasons why the refrigerator stops freezing is a simple lack of voltage in the outlet or a faulty power cord. Despite the obviousness, many people forget to check whether the plug is firmly inserted into the socket. It is also worth inspecting the cord itself for kinks, especially if the equipment is located close to the wall.
If everything is in order with the socket, the next candidate for inspection is thermostat. It is this element that is responsible for turning the compressor on and off depending on the temperature inside the chamber. If it fails, the compressor may simply not receive a signal to start. In older models with mechanical control, it is easiest to check the thermostat.
For diagnostics, you often need to ring the contacts with a multimeter. If the circuit does not close when the sensor temperature changes, the part must be replaced. In electronic models, this is responsible thermal sensor, which can also malfunction due to oxidation of contacts or internal break.
- 🔌 Check the integrity of the plug and power cord, make sure there is voltage in the outlet.
- ❄️ Listen to see if there is a click when turning the thermostat knob (for mechanical models).
- 💡 Inspect the light bulb inside: if it is on, it means electricity is flowing into the chamber.
- 🛠️ Use a multimeter to check the resistance of the thermostat in different positions.
Replacing the thermostat - procedure simple, but requires precision. It is important to choose the right analogue, since the temperature characteristics of different models may differ. An incorrectly selected sensor will cause the refrigerator to freeze too much or not reach the temperature at all.
⚠️ Attention! Before replacing any electrical components, be sure to unplug your refrigerator. Operation under voltage is unacceptable.
Faults in the starting relay and compressor
If the engine hums but does not start, or starts for a couple of seconds and stalls with a characteristic click, most likely the problem lies in the starting relay or the compressor itself. Start relay is a small unit that gives an impulse to start the engine. Over time, its contacts may burn out, or the internal coil may burn out.
Replacing the relay yourself is quite simple: it is usually attached to the side of the compressor and secured with a bracket or latches. By removing the cover, you can visually assess the condition of the part: blackening, a burning smell, or melting of the plastic will indicate the need for replacement. The main thing is to purchase a relay with exactly the same marking.
A more serious situation arises when the compressor itself is faulty. If the motor hums but does not rotate, the piston group may be jammed. In some cases, the so-called “stimulation method” helps - applying increased voltage, but doing this at home is extremely dangerous and is not recommended without special equipment.
How to distinguish a relay failure from a compressor failure?
If, after replacing the start relay, the compressor still hums and does not start (or knocks out the machine), there is a high probability of an interturn short circuit in the winding of the motor or wedge. In this case, the compressor needs to be replaced, which is a complex procedure that requires evacuation of the system and charging with freon.
The table below will help systematize the symptoms and probable causes of problems with the motor group:
| Symptom | Probable cause | Complexity repair |
|---|---|---|
| Silence, no response | Open circuit, thermostat | Low |
| Humming and clicking | Start relay | Low |
| Humming, body heating | Compressor wedge | High |
| Works without stopping | Freon leakage, thermostat | Medium/High |
Refrigerant leak and system blockage
If the compressor runs continuously, it hums, but there is no cold or it is very weak, there is a high probability of a leak freon or clogging of the capillary tube. The refrigerant circulates in a closed circuit, and any leakage leads to its gradual disappearance. Without freon, heat exchange does not occur, and the products begin to deteriorate.
Detecting a leak visually is difficult, since the gas is colorless and odorless. An indirect sign may be swelling of the rear wall of the refrigerator (at the place where the evaporator is sealed) or the appearance of oily spots near the compressor. Also, the characteristic frost may be absent on the tubes or, conversely, frost may appear in only one place.
Clogging of the capillary tube often occurs due to moisture entering the system or oxidation products. In this case, the filter drier may become covered with frost, and the compressor will work with overload. It is impossible to fix a leak or blockage on your own impossibleas special equipment is required for pumping out air, evacuation and filling refrigerant under pressure.
Attempts to simply “top up” the refrigerator without finding and eliminating the leak will only give a temporary effect. After a few weeks or months, the gas will come out again and the problem will repeat. Therefore, if you suspect a leak, it is better to immediately contact professionals who will find the location of the damage and seal it.
- 🔍 Look for oil stains on the floor or on parts of the refrigeration unit.
- ❄️ Pay attention to the uniformity of cooling: if the freezer is working and there is heat in the main chamber, this is a sign of a leak.
- 🔊 Listen to the sounds: gurgling or hissing may indicate movement of the freon and oil mixture.
⚠️ Attention! Freon used in modern refrigerators is safe for humans in small quantities, but working with it requires a license and equipment. Do not try to open the circuit yourself.
No Frost system malfunction
In refrigerators with the system No Frost cooling problems are often associated with the formation of an ice plug in the cold air supply channel. If the defrosting system (heating element, timer, defrost sensor) fails, the evaporator becomes overgrown with ice and the fan stops pushing air into the chamber. As a result, there may be cold in the freezer, and warmth in the refrigerator compartment.
Diagnosis of this malfunction often requires partial disassembly of the rear wall of the freezer. If you find a huge lump of ice hiding the evaporator, then the defrost system has not worked. In this case, it is necessary to check the integrity of the defrost heating element and the sensor.
It is also worth inspecting the fan. If its blades are frozen and do not rotate, air circulation is impossible. Sometimes the problem is solved by simply defrosting the refrigerator during the day, but if the defect recurs, you will need to replace the failed elements of the defrosting system.
☑️ Checking the No Frost system
It is important to note that in models from different manufacturers, such as Samsung or Beko, access to the defrost system may differ. In some cases, you need to remove the entire back wall, in others, it is enough to dismantle the plastic casing. Always check the technical documentation for your specific model.
When you need to call a technician
Despite the desire to save money, there are situations when DIY repairs are impractical or dangerous. If you have checked all the electrical circuits, made sure that the thermostat and relay are working, but the refrigerator still does not work, the reason is most likely hidden inside the sealed circuit.
Opening the system, replacing the compressor or finding a leak requires expensive equipment: a pressure gauge station, a vacuum pump, a burner and scales for refilling freon. The purchase of such a set of tools for one-time repairs is not economically justified.
In addition, modern refrigerators are crammed with complex electronics. If it fails modular control board, its diagnosis requires deep knowledge of circuitry. Unprofessional soldering can lead to burnout of other components and final failure of the equipment.
⚠️ Attention! If your refrigerator is under warranty, any independent repair (even replacing a light bulb) may result in denial of warranty service. Save the seals and call an authorized service.
It is also worth considering calling a specialist if the repair requires moving a heavy unit or its complex disassembly in a small kitchen. Professionals have the experience and tools to get the job done quickly and cleanly, minimizing the risk of damage to the interior or the appliance itself.
Frequently asked questions (FAQ)
How long should the refrigerator cool down after first turning on?
After transportation and first turning on, the refrigerator needs time to stabilize the compressor and set temperature. This process usually takes from 2 to 12 hours, depending on the model and volume of the chambers. It is recommended to load products only after the unit has run idle and reached the set mode.
Why does the refrigerator work non-stop and does not turn off?
Continuous operation of the compressor can be caused by several factors: freon leakage (the motor tries to compensate for the lack of cold), thermostat malfunction (it does not give a signal to turn off), damage door seal or installing equipment near a heat source. Also, the “Super Freeze” mode, if it does not turn off automatically, forces the equipment to work at the limit.
Is it possible to use a refrigerator if it has stopped freezing?
It is not recommended to operate a faulty refrigerator. If the problem is a freon leak, the compressor will work without interruption, which will lead to overheating and burnout of the windings. If the problem is electrical, there is a risk of short circuit and fire. It is better to turn off the device and wait for repairs.
How often do you need to defrost a No Frost refrigerator?
The technology No Frost implies automatic defrosting of the evaporator, so there is no need to manually remove ice from the chambers. However, once every 6-12 months it is recommended to completely defrost and wash the refrigerator for hygiene and removal of odors, as well as to check the drainage holes.