The situation when you When you open the door of your favorite refrigerator, it’s room temperature and it always takes you by surprise. This is not just a household trifle, it is a real threat to the safety of food and the health of the entire family. Food spoilage it comes quickly, and in such a situation you need to act quickly and competently. Often, panic forces you to take rash actions that can only aggravate the breakdown.
In this article we will analyze in detail why the refrigerator does not cool the freezer, and how to determine the source of the problem yourself. We will consider both simple operational errors and complex technical faults that require the intervention of a specialist. Understanding the structure of your equipment is the first step to successful repair.
Before calling a specialist, it is worth conducting an initial diagnosis. In 30% of cases, equipment stops freezing due to improper placement or banal overload, and not because of the breakdown of expensive components. If you are convinced that everything is in order with the modes, and it’s still warm inside, you’ll have to dig deeper.
Operating errors and external factors
Often the problem lies not in the hardware, but in the how we use technology. Before sounding the alarm, check the basic settings. Perhaps one of the household members accidentally turned off the mode Super Freeze or switched the refrigerator to the “Vacation” mode. It is also worth checking the tightness of the seal - if it is dirty or damaged, the cold will evaporate.
The location of the refrigerator plays a critical role in its operation. If the unit is standing close to a wall or in a niche without gaps, heat exchange is disrupted. Condenser does not have time to cool down, and the cooling system is overloaded, which can lead to the compressor stopping. Make sure that there is a gap of at least 5-7 cm between the back wall and the furniture.
⚠️ Attention: If your refrigerator is in direct sunlight or next to a radiator, no settings will make it work efficiently. Heat from the outside blocks heat removal from the inside.
Another important nuance is the volume of loaded products. If you jam the shelves, it breaks air circulation. The refrigerant simply cannot cover the entire volume of the chamber evenly. In two-chamber models with a system No Frost this is especially critical, since air must move freely between the products.
Problems with electrical and thermoregulation
If the refrigerator looks good on the outside, but it’s warm inside, you should listen to its operation. Is the engine humming? Is the light on? No sounds may indicate electrical problems. Often the culprit is thermostat (thermostat), which does not give the command to turn on the compressor, “thinking” that the cold has already been reached.
In modern models, the electronic control module is responsible for the temperature. A failure in its operation or a power surge in the network can lead to the board “forgetting” to start cooling. In such cases, a complete reboot helps: unplug the device for 15-20 minutes, and then turn it on again.
☑️ Electrical diagnostics
Particular attention should be paid to the compressor starting relay. This small element is responsible for starting the engine. If the relay burns out, you will hear a characteristic click, after which the engine will try to start and immediately stall. Replacing the relay is a simple procedure and is often done by hand.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The compressor hums, but does not start | Malfunction start relay | Low |
| Complete silence, no light | Open circuit or socket | Low |
| The refrigerator turns on and immediately turns off | Problems with the thermostat | Medium |
| Temperature alarm indicator is on | Electronics or sensor failure | High |
No Frost system malfunctions
Refrigerators with a No Frost system require special attention to the condition of the evaporator and fan. If you notice that the freezer has become warmer, and “snow” or ice has appeared on the back wall of the main chamber, it means that the defrosting system has failed. In such cases, the air does not circulate and the cold does not enter the chambers.
The main enemy of the system No Frost is the defrost heating element and the timer (or electronic defrost control module). If the heating element burns out, ice freezes on the evaporator, blocking the operation of the fan. As a result, the engine hums, but there is no cold. Sometimes the problem is solved by completely defrosting the refrigerator within 24 hours.
How to check the No Frost fan?
To check, you need to remove the back panel in the freezer. With the door open, press the sensor button (if equipped) or simulate the door closing to start the fan. If it does not spin when the compressor is running, the problem is in it or in its power supply.
It is also worth checking the defrost sensor. It tells the control board when to turn on the heater to defrost the ice. If the sensor “lies,” the ice can grow endlessly until it completely blocks the air supply channels. This is a common reason why the upper chamber does not freeze refrigerator.
Leakage of refrigerant (freon)
One of the most unpleasant situations is a leak refrigerant. Freon circulates in a closed circuit, and if a microcrack has formed somewhere, the gas gradually evaporates. First, the refrigerator starts to work longer, then it turns on more often, and eventually it stops cooling completely.
It is difficult to determine a leak visually, but it is possible by indirect signs. If the condenser (grid at the back or on the sides) remains cold while the engine is running, this is a sure sign of a lack of freon. Also, there may be no characteristic uniform frost on the evaporator tubes.
⚠️ Attention: Filling a refrigerator with freon is not just “topping up gas.” It is necessary to find the leak, seal it and only after evacuating the system, refill the refrigerant. You can’t do this without special equipment.
Often leaks occur in solder areas or in the foamed part of the case due to corrosion. If the tube has rotted inside the refrigerator wall, repair may not be economically feasible. In such cases, experts sometimes suggest installing an external evaporator (“crying”), which changes the appearance of the unit, but brings it back to life.
Failure of the compressor
The compressor is the “heart” of the refrigerator. If it fails, there will be no cold anywhere. Modern inverter compressors LG or Samsung take a long time, but they are not immune to breakdowns. Symptoms are: the engine hums but does not start; the engine starts for a couple of seconds and stalls; the motor runs constantly, but does not cool.
Replacing a compressor is a complex and expensive process. It requires not only replacing the unit itself, but also installing a new filter-drier, evacuating the system and accurately charging with freon. It is almost impossible to perform this operation on your own without professional tools.
It is important to understand the difference between failure of the electrical part of the compressor (windings) and the mechanical part (piston wedge). In the first case, the motor may hum, in the second, it may be silent or click quietly. Diagnostics requires measuring the resistance of the windings with a tester.
Clogged capillary tube
The capillary tube is the thinnest channel through which freon enters the evaporator. Over time, the system may become clogged due to oil breakdown products or moisture. This disrupts the circulation of the refrigerant: the inlet pressure drops and the outlet pressure increases, and cooling stops.
Signs of blockage are often confused with a lack of freon. However, if clogged, the compressor can run very loudly and become very hot. The capacitor will be hot only at the beginning, and then cold. The freezer may be colder than the refrigerator compartment, or vice versa, depending on the location of the blockage.
Removing the blockage requires purging the system with high pressure nitrogen. If simple blowing does not help, you have to cut out a piece of the capillary tube and solder in a new one. This is jewelry work that requires the experience and qualifications of a craftsman.
Frequently asked questions (FAQ)
Is it possible to use a refrigerator if it has stopped freezing, but the light is on?
You cannot use it to store food, since the temperature inside will be higher than safe. However, you can enable it for diagnostics. If the engine runs, but there is no cold, there is a technical problem. If the motor is silent, check the thermostat or relay.
How long does it take to defrost the refrigerator if there is a problem with No Frost?
It takes at least 24 hours to completely defrost the ice on the evaporator, which is not visible to the eye. Simply turning it off at night is often not enough, especially if the ice plug is dense.
Why did the refrigerator work after defrosting, but a week later it stopped again?
This is a classic sign of a malfunction of the defrost system (the heating element, timer or sensor burned out). Defrosting removed the ice temporarily, but the reason for its formation remained, and the ice builds up again, blocking cooling.
Is it dangerous to change the freon in the refrigerator yourself?
Yes, it is dangerous and ineffective. Freon ignites under certain conditions, and the wrong dose or the presence of air in the system will lead to rapid breakdown of the compressor. Leave it to the professionals.