The situation when food continues to freeze, and the main compartment suddenly becomes warm, is one of the most common and alarming for the owner of household appliances. This is a classic symptom indicating a refrigerant circulation problem or a malfunction in the temperature control system. Unlike a complete failure of the compressor, here the cooling unit functions, but the cold does not reach where it is needed most. freezer compartment continues to freeze food, and the main compartment suddenly becomes warm, this is one of the most common and alarming problems for the owner of household appliances. This is a classic symptom indicating a refrigerant circulation problem or a malfunction in the temperature control system. Unlike a complete compressor failure, here the cooling unit is functioning, but the cold is not getting to where it is needed most.
There is no need to panic in such a situation, since in many cases the problem is solved relatively quickly and without calling a technician. However, you cannot ignore the signal: if the upper compartment in a two-chamber refrigerator stops working, food may spoil within a few hours. Understanding the principle of operation of the system Indesit or LG The top compartment has stopped working, food may spoil within a few hours. Understanding how the system works No Frost or drip defrosting will help you quickly localize the breakdown.
First of all, you need to assess the scale of the disaster: is there ice on the back wall, is the fan working, and are the air ducts blocked. Often the reason lies in a simple blockage or electronics failure, which can be corrected by rebooting. Below we will analyze in detail the mechanical and electrical reasons why refrigerator stopped cooling, keeping the freezer working.
Violation of operating rules and clogging of air ducts
Before taking a multimeter or looking for spare parts, it is worth eliminating the human factor. In system refrigerators No Frost cold is generated in the freezer compartment, and then driven by a fan into the upper compartment through special channels. If you've recently loaded a lot of groceries or haven't closed the door properly, air flow may have been blocked. Warm air trapped inside causes the formation of excess ice, which blocks the channels.
This happens especially often in models with narrow spaces between shelves. When products lie close to the back wall, they block the outlet openings air ducts. As a result, the fan hums, the compressor wears out, but the cold flow simply cannot physically enter the refrigerator compartment. In such cases, the temperature rises gradually, over the course of a day.
⚠️ Attention: Never place hot pots or warm containers inside. A sharp jump in temperature and humidity leads to instant fouling of the evaporator with a “fur coat”, which blocks the operation of the entire system.
It is also worth checking whether the rubber sealing tape has frozen. If the door does not close tightly, moist air constantly enters. The defrosting system cannot cope with the volume of ice, and the ice plug blocks the path to the cold. A visual inspection of the air supply channel often helps to understand why refrigerator it does not freeze, although the compressor is humming.
Failure in the defrost system (Defroster and heating element)
If you are convinced that the channels are clean and the products are laid out correctly, the next probable cause is a malfunction of the automatic defrost system. In modern models, such as Bosch or Samsung, this process is controlled by a timer or electronic module. If the defrosting mechanism breaks down, a giant lump of ice grows on the evaporator in the freezer, which blocks the operation of the fan.
The freezer in this case continues to freeze, since the evaporator is located there with the food. But the ice block does not allow cold air into the upper chamber. You can check this theory by listening to the operation of the device: if you do not hear the characteristic noise of the fan, most likely its blades have hit the ice.
The main elements that fail in the defrost circuit:
- ❄️ Defrost heating element —a heating element that could burn out and stop melting the ice.
- ⏱️ Defrost timer —a mechanical or electronic device that does not switch the “cooling/defrosting” modes.
- 🌡️ Thermostat defrosting —a sensor that should break the heater circuit when a certain temperature is reached.
Diagnostics of these elements requires disassembling the rear panel of the freezer and testing the circuit with a multimeter. If the heating element does not ring, its resistance is infinite, which means it requires replacement. This is one of the most common reasons why refrigerator works, but does not cool in the upper compartment.
How to defrost a refrigerator correctly?
Complete defrosting takes at least 24 hours. It is not enough to simply turn off the device at night. Ice in the depths of channels can take a very long time to melt. Open the doors, place towels and wait for the water to completely drain.
Malfunction of the blower fan
In systems with forced air circulation (No Frost), the fan is the heart of cold distribution. If it stops, the cold remains in the freezer where the evaporator is located, but does not enter the refrigerator compartment. In this case, the compressor can work continuously, trying to compensate for the lack of circulation, which leads to overheating of the motor.
There may be several reasons for the fan stopping. The most common one is the freezing of the blades, which we mentioned earlier. The second reason is the failure of the fan motor itself. The third is a break in the wiring or oxidation of the contacts going to it. In some models Whirlpool or Atlant the fan may not start due to a malfunction of the door closing sensor.
You can check the operation of the unit as follows:
- Open the refrigerator door.
- Press the button manually door sensor (or press it, simulating closing).
- Listen: if the fan does not hum after a few seconds, the problem is obvious.
Replacing a fan usually does not cause difficulties for home craftsmen. The main thing is to choose an analogue with the same geometric dimensions and supply voltage. If the fan hums but does not spin, the bearing may be jammed or a piece of ice has gotten into it.
☑️ Fan diagnostics
Refrigerant leakage (Freon)
A more serious problem, which is often disguised as “partial” operation of the refrigerator, is leak freon. When the amount of gas in the circuit decreases, there is not enough gas for a full cooling cycle. First of all, the evaporator of the refrigerator compartment stops cooling, since it is located further from the compressor than the evaporator of the freezer.
Signs of a refrigerant leak are quite specific. The compressor works almost non-stop, trying to gain temperature, but the refrigerator is humming and there is no cold. The back wall inside the refrigerator compartment remains warm or at room temperature, while only light frost may form in the freezer. Over time, the lower chamber will also stop freezing.
| Symptom | Probable cause | Action |
|---|---|---|
| The compressor is hot, runs without pauses | Leakage freon or clogged capillary | Call a technician to find a leak |
| The refrigerator is silent, it’s warm inside | Faulty thermostat or start relay | Check the electrical circuit |
| Ice only at the entrance to the evaporator | Partial leakage or blockage | Professional diagnostics required |
| Bloating of the wall between the chambers | Corrosion of foam circuit | Complicated repair or replacement of the housing |
It is impossible to eliminate the leak on your own, since it requires evacuation of the system, searching for the location of the damage (often this is an internal circuit foamed in the housing) and filling with new gas. Attempts to simply “add freon” without eliminating the leak will only give a temporary effect on the couple weeks.
Clogged capillary tube
Another technical reason why refrigerator It doesn’t freeze well in one of the chambers - this is a clogged capillary tube. This is a thin pipe through which the refrigerant enters the evaporator. If there is moisture or oil breakdown products in the system, an ice or oil plug may form.
Signs of a blockage are similar to a leak: the compressor runs for a long time, the condenser (grid at the back) may only be partially hot or be barely warm. The pressure on the suction side drops and the refrigerant circulation is disrupted. As a result, the evaporator in the refrigeration chamber does not receive enough freon for cooling.
Sometimes the method of “pushing” the system with high pressure helps, but this is a job for a specialist with the equipment. At home, you can try to defrost the unit for 24 hours, hoping that the ice plug in the capillary will melt, but this rarely helps. More often, nitrogen purging and replacement of the filter drier are required.
⚠️ Attention: Do not try to break through the blockage yourself by piercing the pipes or using chemical solvents. This is guaranteed to lead to final breakdown of the compressor and contamination of the circuit.
Problems with the thermostat and electronic module
If your refrigerator has a mechanical one thermostat, its malfunction may result in the compressor not turning on often enough or operating for too short a time. The sensor may “stick” in the “open” position, believing that the temperature is normal, although the refrigerator compartment is already warm.
In models with electronic control (for example, LG, Samsung, Bosch), the main control module is responsible for the distribution of cold. It receives signals from temperature sensors in each chamber. If the sensor in the refrigerator compartment is lying or is faulty, the module may not give a command to cool this particular zone, believing that there is cold there.
Diagnostics of electronics is complex and requires knowledge of circuit design. However, the module can often be “rebooted” by unplugging the refrigerator for 15-20 minutes. If after turning on the system worked correctly, a software glitch may have occurred. If the error recurs, the sensor needs to be replaced or the board repaired.
What to do: owner's action algorithm
If you encounter the problem described, act consistently. First, rule out simple causes: check the tightness of the doors, the position of the temperature regulator and the presence of products in front of the air ducts. Make sure that the refrigerator is level and nothing interferes with the normal air circulation around the body.
Then carry out a complete defrost. Even if you have a No Frostsystem, leave the device turned off with the doors open for 24 hours. This will allow the ice in the hidden channels and evaporator to melt. Often, after such a procedure, the equipment begins to work properly if the cause was freezing.
If defrosting did not help, evaluate the nature of the compressor operation and the presence of cold in different zones. If the freezer freezes to death, but the refrigerator compartment is warm, and the compressor does not turn off, this is almost guaranteed to be a freon leak or a blockage. In this case, you cannot do without specialized service.
Why is there ice in the freezer, but warm in the refrigerator?
This is a classic sign of impaired air circulation. Ice in the freezer indicates that refrigerant is circulating and cooling the evaporator. The absence of cold in the upper compartment means that cold air does not reach there due to blockage of the channels with ice, a broken fan or a clogged defrost system.
How long does the refrigerator keep cold when turned off?
A working modern refrigerator with a full load of food maintains a safe temperature (up to +8...+10°C) for 6-8 hours at closed door. If there is a lot of water or little food in the chamber, the time is reduced to 3-4 hours. When the unit is running but not cooling, food may spoil faster.
Is it possible to operate a refrigerator if the upper chamber does not freeze?
For a short time - yes, if you transfer perishable foods to the freezer or use them. However, prolonged operation in this mode is harmful to the compressor, which will work without interruption, trying to compensate for the heat. This can lead to its overheating and final failure.
How to check if the fan is working without disassembling the refrigerator?
In most models, this can be done by ear. When the door is closed (or the sensor is clamped), a quiet hum or whistle of air should be heard. If the freezer is very noisy, but the refrigerator is quiet and warm, the fan may be working, but the air is not passing through the channels (they are clogged with ice). If there is complete silence, the fan does not spin.