The situation when refrigerator compartment continues to cool food, but freezer compartment starts Ice melting or temperature rising is a classic sign of problems with the cooling system. Many users mistakenly believe that since the compressor is humming and the light in the refrigerator is on, it means the appliance is working. However, the lack of cold in the freezer when the main compartment is working often indicates that refrigerant circulation the system’s power has dropped.
The first thing the owner needs to do is to carry out initial diagnostics without disassembling the unit. It is important to listen to the operation of the motor: is it working normally or is it turning on too often? Check whether the ventilation holes inside the chambers are not blocked by food. No Frost System static refrigerators can react to such failures in different ways, but ignoring the first symptoms almost always leads to spoilage of food and expensive repairs.
In this article we will analyze in detail the mechanical and electrical causes of the malfunction, we will explain why Freon leakage often begins with a loss of freezer performance, and we will tell you in which cases you can cope on your own, and when you need to call a specialist.
Violation of operating rules and temperature conditions
Before you panic and search failure in the “internals” of the unit, it is worth excluding the human factor. Often the reason lies in a banal violation of the operating rules, which the user could unknowingly ignore. For example, if you have just defrosted the refrigerator or loaded it with a large amount of warm food, the compressor may not be able to cope with the load, and the cold will stop flowing to remote compartments first.
Particular attention should be paid to a tight fit. freezer doors. Even a microscopic gap in the seal leads to a constant flow of warm, moist air. As a result, a “fur coat” grows on the evaporator, which blocks air circulation. In systems No Frost this causes the fan to stop, and in drip systems - a complete cessation of cooling.
- 🌡️ Check the set temperature: the regulator may have been accidentally moved to the “minimum” or “0” position.
- 🚪 Inspect the rubber door seal for cracks, dirt, or deformation.
- 📦 Make sure that food does not block the cold air outlets.
It is also important to consider the location of the refrigerator. If the unit is placed close to a wall or next to heating devices, heat exchange is disrupted. The compressor wears out, but the freezing efficiency decreases. In such cases condenser (the grill at the back) does not have time to cool, which reduces the overall performance of the cycle.
⚠️ Attention: Do not try to speed up the freezing process by setting the temperature control to the maximum value immediately after loading the products. This can lead to the compressor freezing and the start relay failing.
Checking the door for tightness is a simple but effective method. Take a regular sheet of paper, clamp it with the door and try to pull it out. If the sheet is removed easily and without resistance around the entire perimeter, it means that the seal does not perform its function and requires replacement or adjustment of the door position.
Refrigerant (freon) leakage: symptoms and diagnostics
The most common technical reason why the refrigerator works, but the freezer does not freeze is freon leak. The refrigerant circulates in a closed circuit, and if a microcrack appears in the system, the gas gradually evaporates. Since the freezer is usually located further from the compressor or requires lower temperatures to operate, it is the first to react to a lack of refrigerant.
How to understand that the problem is a leak? The compressor starts working almost without interruption, trying to reach the set temperature. You can hear the constant hum of the engine, but the cold inside does not increase. In some models with one compressor, the cold may be partially retained in the refrigerator compartment due to residual pressure, while the freezer is completely defrosted.
Leak places are often hidden from the user's eyes. They can be located in the foamed part of the housing (evaporator), in the joints of the tubes or in the door heating circuit. It is impossible to independently find and eliminate such a malfunction without special equipment: a leak detector, a vacuum pump and a refueling scale.
If you notice oily stains on the floor under the refrigerator or in the compressor area, this is a sure sign of depressurization of the system. The oil comes out along with the gas, and ignoring this fact will lead to the combustion of the motor-compressor due to lack of lubrication and overheating.
Malfunctions of the compressor and start relay
The heart of the refrigerator - compressor - ensures the movement of freon through the system. If it is faulty, the pressure in the circuit drops and the refrigerant does not reach the freezer evaporator in the required volume. Often the problem lies not in the motor itself, but in starting relaywhich is responsible for starting the engine.
If the relay is faulty, the compressor may hum for several seconds, then click and turn off. This phenomenon is called a "wedge" or attempted launch. In such cases, the freezer does not have time to cool down, and the food begins to spoil. Replacing the relay is an inexpensive procedure and is often performed by craftsmen at home.
However, if the compressor itself fails (for example, the motor winding or mechanical wear of the piston group), the situation becomes more serious. A professional compressor replacementis required, which includes cutting old tubes, soldering in a new unit, evacuation of the system and refilling with freon.
| Symptom | Possible cause | Necessary actions |
|---|---|---|
| The compressor hums, but does not start | The starting relay is faulty or the compressor is jammed | Replacing the relay or diagnosing the compressor |
| The motor runs constantly, it’s cold no | Freon leak or system blockage | Search for leaks, evacuation, refilling |
| A knock or clanging noise is heard during operation | Mechanical destruction of the compressor | Replacing the compressor |
| The compressor is hot, but does not work | Thermal protection relay or broken winding | Checking the electrical circuit of the motor |
It is important to understand that diagnostics of the compressor requires measuring winding resistance and current. Without a multimeter and (current clamps) it is difficult to accurately determine the condition of the motor. Therefore, if you suspect an electrical malfunction, it is better to contact a specialist.
Problems with the defrost system (for No Frost)
In refrigerators with a system No Frost or Full No Frost the defrost system plays a critical role. It prevents ice from fouling the evaporator. If one of the elements of this system fails, the ice coat blocks the operation of the fan, and cold air stops flowing into the chamber.
The main elements of the defrosting system: Defrost heating element, defrost sensor (thermostat) and timer (or electronic control module). If the heating element burns out, the ice does not melt. If the sensor is “stuck”, it may not give a command to turn on the heating or, conversely, not turn off the heating in time.
Signs of a malfunction of the defrost system:
- ❄️ A layer of ice or snow is visible on the back wall of the freezer.
- 🔇 The fan does not work or makes strange sounds (it gets into the ice).
- 🌡️ The temperature in the freezer rises, although the compressor is working.
For diagnostics, you need to defrost the refrigerator manually for 24 hours (with the doors open). If, after complete defrosting, the unit begins to freeze normally, but after a few days the problem returns, the cause is guaranteed to be in the defrosting system. Most often, the heating element and sensor are replaced in a comprehensive manner.
⚠️ Attention: Never try to pick out the ice with a knife or sharp objects! You can damage the aluminum evaporator, which will lead to an immediate leak of freon and costly repairs. Use only a hairdryer to speed up the melting, if necessary.
☑️ Diagnostics of the No Frost system
Clogged capillary tube
Another technical reason why the refrigerator may work, but not freeze — clogging of the capillary tube. In the freon circulation system, this is the narrowest section. If moisture, oil oxidation products or debris enter the circuit (due to poor-quality previous repairs), a plug is formed.
When a blockage occurs, the pressure is disrupted: before the plug it is high, after it it is low. Freon cannot circulate in the required volume, and cooling capacity drops. This is often accompanied by unusual behavior of the condenser: only part of it heats up, while the rest remains cold.
Removing the blockage requires professional cleaning of the system with high-pressure nitrogen or replacing the filter drier and a section of the capillary tube. This is a “dirty” job that requires evacuation and precise charging of refrigerant on a scale.
Malfunctions of the thermostat and control module
The electronics of a modern refrigerator controls all processes. If thermostat (the thermostat) is faulty, it may not give the command to turn on the compressor when the temperature in the chamber has risen. Or vice versa, keep the motor on constantly, which leads to freezing.
In electronically controlled refrigerators, control moduleis responsible for everything. Malfunctions in its operation, oxidation of contacts or failure of temperature sensors (NTC) can lead to incorrect operation of the freezer. For example, the module may “think” that the desired temperature has already been reached and does not turn on the cooling.
How to check the thermostat?
To mechanically test the thermostat, you can close its contacts directly. If the compressor starts after the short circuit, the problem is in the thermostat. However, remember that this is a temporary measure, and without a thermostat the refrigerator will work without stopping, which is dangerous.
Electronics diagnostics require knowledge in circuit design and the availability of tools. Often the control module can be repaired by replacing burnt out elements, but in some cases a complete replacement of the board is required.
When is a call to a technician necessary?
Independent repair is possible only in cases of replacing the seal, defrosting or replacing the lamp. All other manipulations related to refrigerant, electrical circuits of the compressor and disassembling the housing require qualification.
Calling a technician is required if:
- 🛠️ You find an oil leak or hear gas hissing.
- ⚡ The compressor hums, but does not start, or knocks out plugs.
- 🔌 There is a burning smell or melted wires.
- 🧊 After complete defrosting, the refrigerator only works normally for a day.
Professional repairs include not only replacing parts, but also checking the entire system for leaks. This will ensure that the problem does not return in a month. In addition, the craftsmen use original spare parts and provide a guarantee for their work.
Prevention and proper care
To ensure that the refrigerator lasts a long time and the freezer is always full of ice, follow simple rules of prevention. Wash the unit regularly, check the cleanliness of the condenser at the back (dust impairs heat transfer) and monitor the condition of the seals.
Do not load hot food into the chamber and do not keep the door open longer than necessary. These simple actions reduce the load on the compressor and prevent the formation of excess moisture in the system, which can turn into an ice jam.
Why the freezer does not is it freezing, but the refrigerator is working?
Most often this indicates a partial loss of refrigerant (leak) or a clogged capillary system. There is not enough cold for the entire volume, and the area with the lowest required temperature - the freezer - suffers first.
Is it possible to use a refrigerator if the freezer does not freeze?
For a short time - yes, food in the refrigerator compartment can be preserved. However, prolonged operation in this mode is dangerous for the compressor, which works without rest, trying to gain temperature. This can lead to its burning.
How much does it cost to repair if the freezer is no longer cold?
The cost depends on the breakdown. Refilling with freon and finding the leak usually costs less than replacing the compressor. The exact price can only be given after diagnosis by a technician on site.
How to quickly defrost a refrigerator for inspection?
Unplug the unit, open the doors and leave for at least 24 hours. To speed things up, you can use a fan, but not a hair dryer, aimed directly at the plastic so as not to deform it. Place rags to collect water.