The situation when refrigerator compartment stops cooling, while the freezer continues to properly freeze food, is one of the most common complaints from owners of household appliances. This behavior of the unit is often confusing: the indicators are on, the compressor is humming, but the temperature on the shelves rises to room temperature. This is a clear signal that there is a problem in the refrigerant circulation or temperature control system that requires immediate attention.
Ignoring the problem can lead to spoilage of a large number of products and failure of more expensive components, such as the compressor. In some cases, the reason lies in a banal overload or violation of operating rules, but often we are talking about technical malfunctions that require replacement of parts. Understanding the operating principles of your model will help you quickly identify the root of the evil. diagnosis and replacement of parts. Understanding how your model works will help you quickly identify the root of the evil.
In this article we will analyze the main reasons why The refrigerator does not keep cold in the upper compartment, and propose an algorithm of action. You will learn in which cases you can handle it yourself and when you need to call a specialist. It is important not to panic, but to consistently check the key components of the system.
⚠️ Attention: If you notice that the back wall of the refrigerator compartment is covered with ice, and the food is warm, under no circumstances try to pick out the ice with a knife or sharp objects. This will lead to breakdown of the evaporator and leakage of freon, which will make repairs economically unfeasible.
Problems with defrosting and ice on the evaporator
One of the most common reasons why the refrigerator does not freeze well in the upper compartment, there is a violation of the automatic defrosting system (No Frost). In such units, cold is generated in the freezer, and then a fan blows it throughout the entire volume. If the evaporator is overgrown with a “coat” of ice, the air channels are blocked, and the cold simply does not reach the upper chamber.
The defrost sensor and timer (or electronic module) are responsible for the defrosting process. If at least one of these elements fails, the ice does not melt, but accumulates. Visually, this may not be immediately noticeable, since the ice is hidden behind a plastic panel. However, over time, the ice plug becomes so large that the fan stops moving air, or completely blocks the channels. Evaporator heating element, defrost sensor and timer (or electronic module). If at least one of these elements fails, the ice does not melt, but accumulates. Visually, this may not be immediately noticeable, since the ice is hidden behind a plastic panel. However, over time, the ice plug becomes so large that the fan stops moving air, or completely blocks the channels.
How to understand that the problem is in the No Frost system?
If you hear that the fan is humming intermittently, or strange sounds of ice rubbing are coming from the refrigerator, as well as If you don’t feel an active flow of cold air when you open the door, most likely the evaporator is clogged with ice. For an accurate diagnosis, you will need to remove the back panel in the freezer.
For a temporary solution to the problem, completely defrosting the refrigerator within 24 hours often helps. If after switching on the equipment worked normally, but after 1-2 weeks the situation repeated itself, it means that one of the elements of the defrosting system is faulty. Required replacement of the heating element or a sensor.
- ❄️ Symptom: Ice is frozen in the freezer, but it is warm in the refrigerator compartment.
- 🔊 Sound: The fan works with strain humming or goes silent.
- 🌡️ Temperature: Products in the upper compartment begin to deteriorate after 1-2 days.
Compressor malfunctions and problems with freon
If the refrigerator operates silently or, conversely, hums more than usual, but does not freeze, the problem may lie in compressor or a refrigerant leak. The compressor is the “heart” of the unit, which pumps freon throughout the system. Modern two-chamber models often use one compressor, but two cooling circuits, or one circuit with flow separation.
If freon leaks, the pressure in the system becomes insufficient for effective heat exchange. Often in such cases freezer it can still maintain a low temperature due to residual refrigerant or operating at maximum capacity, but the cold no longer reaches the upper chamber. It is difficult to determine a leak visually; it often occurs in the foamed part of the case or in solder joints.
Another serious failure is the failure of the compressor itself or the start relay. If the engine hums, clicks and turns off after a few seconds without starting, or runs constantly without turning off but not generating cold, this is a warning sign. In the case of inverter compressor diagnosis is even more complicated and requires special equipment.
⚠️ Attention: Independent refueling of the refrigerator with freon is impossible without a vacuum pump and a pressure gauge station. Attempts to “add gas” through a puncture in the system will lead to the entry of moisture and air, which will finally kill the compressor.
Clogged capillary tube or filter drier
Refrigerant circulates through thin tubes. If moisture or oil breakdown products are present in the system, cloggingmay form. Most often, the capillary tube or filter drier becomes clogged. As a result, freon cannot circulate freely between the condenser and the evaporator.
A characteristic sign of a blockage is that the condenser (grid at the back) remains only partially cold or warm, and the evaporator in the freezer may be cold, but not freeze evenly. The pressure in the system drops and the cooling capacity decreases sharply. At this time, the temperature in the refrigeration chamber rises.
To eliminate this malfunction, it is necessary cleaning the system nitrogen under pressure and replacing the filter-drier. This is a complex technical procedure that cannot be performed at home without a special tool. Attempts to solve the problem by tapping the tubes can lead to their depressurization.
- 🛑 Cause: Moisture or debris getting into the circuit.
- 📉 Symptom: The compressor works constantly, but there is no cold.
- 🔥 Heating: The capacitor remains cold or barely warm.
Incorrect settings and overload of cameras
Before sounding the alarm and looking for a repairman, it is worth eliminating the human factor. Sometimes users accidentally change the temperature settings. In models with electronic control the failure could occur due to a power surge in the network. Check if the “Vacation” or “Super Freeze” mode is set, which can redistribute resources in favor of the freezer.
Also a common cause of air circulation problems is a banal overload of products. If you pack shelves tightly, especially near the back wall, air flow is blocked. The cold simply cannot penetrate a mountain of food. In system refrigerators No Frost free air circulation is the main condition for operation.
Pay attention to the position of the thermostat. If it is turned to minimum, the compressor may not have time to reach the desired temperature in both chambers, especially in the hot season. Try to slightly increase the cooling power and monitor the changes during the day.
Faulty damper and fan
In refrigerators with a system No Frost and one compressor, cold is supplied to the upper chamber through a special channel blocked by an air damper. This damper opens at the command of the thermostat when the temperature needs to be lowered. If the damper mechanism is stuck in the closed position, cold air from the freezer simply does not enter the refrigerator compartment.
The second important element is fan. It is he who moves the air. If the fan stops (the motor burns out, the bearing is jammed or ice freezes on the blades), circulation stops. In the freezer, the cold is maintained due to the static temperature and the operation of the compressor, and it becomes warm from above.
Diagnostics of the fan is usually simple: open the door of the refrigerator compartment (in many models, when the door is open, the fan should stop, but you can press the button that simulates closing the door) and listen. If there is no sound of operation, but the freezer is humming, the problem is in the fan motor or its power circuit.
Table: Comparison of symptoms and probable causes
To simplify diagnosis, we have compiled a summary table. It will help you navigate the symptoms and understand which node most likely failed in your case.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Ice on the back wall, no cold on top | No Frost system malfunction (heating element, sensor) | Average | Defrost, replacing parts |
| The compressor is hot, clicks, does not starts | Start relay or compressor | High | Call a technician, replace the motor |
| The refrigerator hums, but does not freeze at all | Leakage freon or blockage | High | Looking for leaks, refilling |
| It’s cold in the freezer, it’s warm on top, quiet | The fan or damper does not work | Average | Electrical check, fan replacement |
As can be seen from the table, some problems are solved relatively quickly, others require serious intervention. It is important to correctly interpret the signals that your unit gives.
When you need to call a technician
There are a number of situations when self-repair is not only useless, but also dangerous. If you have checked the settings, defrosted the refrigerator, made sure that the seal is intact and the channels are clean, but the problem has not gone away, you most likely need professional diagnostics.
It is especially important to contact specialists if you suspect a freon leak or a compressor breakdown. These jobs require a license, special equipment and skills. In addition, modern refrigerators are equipped with complex electronics, the errors of which are read only through the service port.
⚠️ Attention: Opening a sealed circuit unnecessarily (for example, for the sake of “checking”) often leads to moisture entering the system, which entails expensive repairs. Do not open the tubes if you are not 100% sure of your actions.
☑️ Checklist before calling a technician
Prevention and proper care
So that the situation when The refrigerator has stopped freezingdoes not take you by surprise, it is important to follow the operating rules. Defrost equipment regularly (even the No Frost system is recommended to be defrosted once a year for prevention). Keep the rear grill clean - dust impairs heat transfer.
Do not put hot foods in the chamber and do not overload the shelves. Periodically check the condition of the sealing rubber: it should be clean, elastic and fit snugly to the body. Following these simple rules will extend the life of your refrigeration equipment refrigeration equipment for years.
Remember that timely detection of minor faults, such as a creaking fan or rare clicks of a relay, allows you to fix them cheaply. Do not bring the equipment to a state where repair becomes impossible or economically unprofitable.
Frequently asked questions (FAQ)
Why does the refrigerator turn on for 5 seconds, click and turn off?
This is a classic sign of a malfunction of the compressor starting relay or the compressor itself (interturn short circuit). The motor tries to start, but the current increases sharply, and the thermal relay opens the circuit, making a clicking sound. Relay replacement or motor diagnostics is required.
Is it possible to operate the refrigerator if the upper chamber does not freeze?
For a short time - yes, to save food. But long-term work in this mode is harmful. The compressor will work non-stop, trying to gain temperature, which will lead to overheating and eventual combustion. In addition, bacteria will begin to multiply in the chamber.
How long should defrosting last to remove the ice plug?
To completely melt the ice in the hidden channels and on the evaporator, it is recommended to defrost the refrigerator for at least 24 hours. Simply turning it off at night may not be enough, since ice in hard-to-reach places will take a very long time to melt.
Does the temperature in the room affect the operation of the refrigerator?
Yes, significantly. If the room is hotter than +30°C or colder than +10°C (for most models), the refrigerator may not operate correctly. In cold weather, the oil in the compressor thickens, and in extreme heat the system does not have time to give off heat, which leads to malfunctions.