The situation when there are petrified food, and the refrigerator compartment is at room temperature, is one of the most common and alarming problems for owners of household appliances. This behavior of the unit indicates a serious malfunction cooling systemswhich requires immediate intervention. Ignoring the problem can lead to spoilage of a large volume of products and failure of an expensive cooling system compressor.
The essence of the problem lies in the disruption of refrigerant circulation or failures in the distribution of cold between two chambers of the same circuit. In modern models, especially with the system No Frost, a fan is responsible for air movement, and in older two-compressor models - separate circuits. Understanding the operating principle of your device will help you quickly determine which unit has failed.
Next we will analyze in detail the main reasons why the freezer works and the refrigerator stops cooling, and we will consider action algorithms for each situation. Self-diagnosis will allow you to save time on calling a technician, or at least accurately describe the symptoms to a specialist.
No Frost system malfunctions and problems with air circulation
In refrigerators with the system No Frost cold is generated in the freezer compartment, and then the fan moves the cooled air into the refrigerator separation through special channels. If fan stopped or its impeller is blocked by ice, circulation stops. As a result, the freezer continues to freeze (since the evaporator is located there), and the upper compartment becomes warm.
Often the reason the fan stops is ice freezing on its blades or in the air ducts. This is due to a malfunction Defrost heating element or the timer, which should periodically melt the ice on the evaporator. If the defrost system does not work, the ice plug grows and blocks the path of cold air.
⚠️ Attention: If you hear a humming or crackling sound coming from the back wall of the refrigerator, but no cold is coming, this may indicate that the fan motor is trying to start, but is jammed with ice or bearing.
To check the functionality of the system, it is necessary to conduct a visual inspection. In some models, access to the fan is possible after removing the plastic panel in the freezer compartment. Make sure that the blades rotate freely when the compressor is turned on.
How to check the fan without disassembling?
Put your ear to the back wall of the freezer when the compressor starts. You should hear the characteristic noise of a running motor and air movement. If you can only hear the hum of the compressor, but there is no air whistling, the problem is in circulation.
It is also worth checking the condition of dampers (damper), which regulates the volume of supplied air. If the damper is stuck in the closed position, the cold simply does not enter the refrigerator compartment. This is a common problem in brand models Liebherr and Bosch.
Freon leakage: partial loss of refrigerant
One of the most insidious reasons why the freezer works but the refrigerator does not is refrigerant leak. Freon circulates in a closed circuit: first it passes through the evaporator of the freezer, where it boils and takes away heat, and then, already heated, enters the circuit of the refrigeration compartment. If the amount of gas in the system is critically reduced, it is only enough for the first stage - freezing, and it no longer reaches the top of the circuit or does not boil there with the required intensity.
A leak can occur anywhere: in the foamed part of the body (through microcracks in aluminum tubes), in the heating circuit of the door perimeter or in places rations. Owners often notice that the back wall of the refrigerator has stopped weeping (covered with condensation), and the compressor is working almost non-stop, trying to gain temperature.
Leakage symptoms develop gradually. At first, the refrigerator begins to cool worse, then the intervals of operation of the compressor increase, and eventually room temperature is established in the refrigerator compartment. Unlike problems with electronics, here mechanical failure requires the intervention of a technician with equipment to find leaks, evacuation and refilling.
It is important to understand that simply “add freon” without finding and eliminating the leak is a temporary measure that will not solve the problem. The gas will go away again in a few days or weeks. A full diagnostic using a leak detector is required.
Clogged capillary tube and compressor operation
The capillary tube is a thin copper pipeline that serves as a choke in the system, creating the necessary pressure for freon to boil. If moisture, oxidation products or debris are present in the refrigerant circulation system, cloggingmay form. Most often it occurs at the junction of the tube into the evaporator.
With partial blockage, the situation looks exactly like this: the freezer is working normally (since there is still pressure and circulation before the blockage), but the refrigerator does not cool. In this case, the compressor may operate with overload, make louder sounds, or turn on with a characteristic click and turn off immediately (if the thermal relay is triggered).
There is also the concept of “hydraulic blockage”, when an excess amount of oil or moisture remains in the system, which freezes in a bottleneck in the capillary. It is interesting that such a blockage can be temporary: after a long defrosting (24 hours), the ice plug melts and the refrigerator starts working again, but after a while the problem returns.
- 🧊 Sign of a blockage: the compressor is hot, the condenser (grid at the back) heats up unevenly or only at the beginning.
- 🔇 Symptom blockage: absence of the characteristic sound of gurgling or hissing of freon when the unit is operating.
- 🔄 Sign of blockage: cyclical operation - the refrigerator turns on, runs for a while and turns off before reaching temperature.
Removing the blockage requires purging the system with nitrogen under high pressure and replacing the filter-drier. It is impossible to carry out this procedure independently without a specialized tool.
Failures in the operation of electronics and temperature sensors
Modern refrigerators are controlled by electronic modules that receive data from temperature sensors (thermistors). If the sensor in the refrigerator compartment is “lying” and sends a signal to the module that it is already “-20°C”, the module will not give a command to cool. In this case, the freezer can operate using its own sensor or timer.
Sensors often fail due to power surges or natural aging. Their resistance changes incorrectly. Also, the problem may lie in the control unititself: oxidation of contacts, burnt tracks or relay responsible for turning on the compressor or fan.
⚠️ Attention: Before replacing electronics, be sure to test the sensors with a multimeter. Their resistance should change with temperature changes (check by heating in the hand or cooling).
In models with a display on the door, you can often see error codes that will indicate a specific faulty unit. For example, series codes Error F or E with a digital index may indicate an open circuit in the sensor.
If you find that the capacitors on the control module are swollen or traces of burning are visible, repairing electronics at home is only possible if you have soldering and circuit design skills. In most cases, it is easier to replace the module with a new one or repair it at a service center.
Mechanical damage and wear of seals
Although this reason seems trivial, it is often overlooked. If sealing rubber the door of the refrigerator compartment has lost its elasticity, is torn, or is simply dirty, warm air from the room constantly enters the chamber. The compressor tries to compensate for heat loss, but its power is not enough, especially if the door does not close tightly.
Unlike a freezer, which is used less often, the door of the refrigerator compartment is opened dozens of times a day. Mechanical wear occurs faster. Also, the door may warp due to excess food or loose hinges.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet with the door around the perimeter. If it is pulled out easily without resistance, it means that the fit is broken in this place.
| Type of damage | Symptom | Elimination method |
|---|---|---|
| Dirty rubber band | The door is not sticks, plaque is visible | Wash with soapy water |
| Deformation (creases) | A gap is visible in a certain place | Warming with a hairdryer and straightening |
| Rupture or crack | Constant flow of warm air | Replacing the seal |
| Door misalignment | Uneven height gap | Hinge adjustment |
It is important to monitor the condition of the loops. If the door is sagging, it will not close tightly even with a new seal. The adjustment is usually made using a hexagon on the upper or lower hinge.
Algorithm for self-diagnosis and defrosting
Before calling a specialist, it is worth eliminating simple causes and trying the “defrosting treatment” method. This method is effective in 50% of cases if the problem is caused by clogging of the air channels with ice or temporary water blockage.
For proper defrosting, you must completely disconnect the refrigerator from the network. Remove all food, open the doors and leave the unit for at least 24 hours (preferably 24 hours). Simply turning it off at night is not enough, since the ice in hidden channels can take a very long time to melt.
☑️ Correct defrosting
After defrosting, turn on the refrigerator and let it run empty for 2-3 hours. Check the temperature. If cold appears, then the problem was in the system from