A sudden increase in temperature in the freezer compartment of Indesit, LG or Atlant refrigerators to room values often indicates a critical failure of the compressor or a refrigerant leak, which requires immediate diagnosis to avoid food spoilage and expensive repairs.
Why does this happen? The reasons can be trivial, for example, incorrect defrosting or lost settings, or technically complex, associated with a refrigerant leak. Compressor it may hum, but not create pressure, or, conversely, be silent. It is important not to panic, but to conduct an initial diagnosis to understand the scale of the disaster. In this article we will analyze in detail all possible failure scenarios.
The first thing to do is listen to the operation of the unit. Is the engine humming? Is there light inside? These simple observations will help narrow down your search. Next, we will look at the main components responsible for the cold and methods for checking them.
Checking simple causes: settings and operating modes
Before calling a technician or disassembling the back wall, it is worth eliminating the human factor. Often, users accidentally change the settings or do not take into account the operating features of the equipment during the hot season. In electronically controlled models, such as Samsung or Bosch, a power failure could put the refrigerator into demo mode or simply lower the temperature setting.
Check whether the Vacation or Eco function is turned on, which limits the operation of the freezer to save energy. Also make sure the thermostat is not turned all the way down. If you have a two-compressor system, it is possible that the freezer circuit has failed, while the main refrigerator continues to work properly.
⚠️ Attention: In some models with a system No Frost if the door is open for more than 3-5 minutes, an alarm may sound and the compressor will temporarily stop starting. Give the equipment 20-30 minutes to stabilize.
Pay attention to the tightness of the door. If the rubber seal is worn out or dirty, the cold will evaporate, and the compressor will work for wear, trying to compensate for the heat gain, but will never reach the desired temperature.
- 🌡️ Check if the Super Freeze mode has been set too long - it is not intended for constant operation.
- 🚪 Inspect door seal for cracks, tears or sticky deposits.
- ⚙️ Make sure that the ventilation holes inside the chamber are not blocked by food.
Problems with the defrosting system in No Frost refrigerators
If you have a refrigerator system No Frostand the freezer has stopped freezing, in 80% of cases the defrosting system is to blame. The operating principle of such units involves the removal of moisture to the evaporator, which must be periodically heated by a special heating element. If this process is disrupted, the evaporator becomes overgrown with a “coat” of ice, which blocks the circulation of cold air.
The fan, which is supposed to drive cold through the chamber, simply gets stuck in a block of ice or stops spinning due to icing. As a result, the compressor works, there is freon, but the cold does not enter the chamber. This is often accompanied by a loud noise or cracking of ice.
For diagnosis, you will need to completely defrost the refrigerator within 24 hours. If after this it starts to freeze, but after a week the problem returns, it means that one of the elements of the defrost system has burned out: the heating element, timer or thermostat.
| System element | Function | Symptom of failure | Complexity replacement |
|---|---|---|---|
| Defrost heating element | Heats the evaporator | Ice does not melt during defrosting | Medium |
| Defrost thermostat | Turns off the heating element when heating | The heating element does not turn on or constantly heats | Low |
| Defrost timer | Switches modes | The refrigerator does not goes into defrost | High |
| Fan | Air circulation | Noise, lack of airflow | Low |
It is important to understand that Mechanical chipping of ice with a knife is strictly prohibited - you can break the evaporator channels, and then the repair will cost the cost of a new refrigerator.
☑️ Diagnostics No Frost
Leak of refrigerant (freon): symptoms and consequences
The most unpleasant and expensive reason is a leak Freon. The refrigerant circulates in a closed circuit, and if a microcrack has formed somewhere, the gas gradually evaporates. Unlike engine oil, freon is not consumed during operation, so its shortage always indicates depressurization.
Often a leak occurs in the foamed part of the housing or in places where pipes are soldered. If your refrigerator used freon R600a (isobutane), which is explosive, refilling it yourself is impossible and dangerous. Symptoms of a leak appear gradually: first, the freezer begins to freeze worse in the corners, then it stops completely.
⚠️ Attention: If you hear a hissing sound or see an oily spot under the refrigerator, immediately unplug the appliance and ensure the room is ventilated. This may be a sign of an active leak.
When there is a leak, the compressor may work non-stop, trying to gain temperature, which leads to its overheating and eventual combustion. Therefore, if you notice that the refrigerator is humming around the clock, but there is no cold, call a technician to look for a leak.
Craftsmen use leak detectors or the “soapy water” method (for open areas) to find the location of the damage. After the hole is eliminated, the system is evacuated and refilled with new gas.
Faults of the compressor and start relay
The compressor is the heart of the refrigerator. If it stops pumping freon, circulation stops. However, often the motor itself is intact, and the problem lies in the start-up relay. This is a small device that gives an impulse to start the engine. If the relay burns out, the compressor hums, clicks, but cannot start.
In more serious cases, an interturn short circuit of the compressor windings occurs or it becomes jammed. This can be determined by a characteristic hum and a subsequent click (the protection is triggered), after which there is silence. After some time, the cycle repeats.
Replacing a compressor is a complex procedure that requires welding copper tubes, evacuating the system and accurately charging with freon. At home, without special equipment vacuum pump and a pressure gauge station, it is impossible to carry out high-quality repairs.
- 🔊 A loud metallic clang upon startup often indicates destruction of the internal parts of the compressor.
- 🔥 If the compressor heats up to 90 degrees or more - this is a sign of dry operation or a wedge.
- ⚡ Lack of response to connection to the network may indicate winding combustion.
How to check the start relay?
Remove the relay from the compressor and shake it. If you hear a knocking sound inside (as from broken glass or loose parts), it means it is faulty. You can also test the contacts with a multimeter.
Clogged capillary tube and other mechanical blockages
The capillary tube is the thinnest channel through which freon enters the evaporator. Its diameter is so small that even a microscopic piece of debris remaining after installation, or a product of oil breakdown, can clog the system. This phenomenon is called “clogging.”
When clogged, freon cannot circulate: it is compressed by the compressor, but does not pass beyond the plug. The pressure in the system increases, the compressor is overloaded, but there is no cold. Often, the condenser (grid at the back) remains cold or warm only at the beginning.
To remove the blockage, professional purging of the system with nitrogen under high pressure is required. Sometimes it is necessary to replace the filter drier, which is designed to capture moisture and debris, but has overflowed.
Another rare but possible reason is the formation of an ice plug in the capillary due to moisture entering the system. This often happens after a poor-quality previous repair, when the system was not properly evacuated.
When to call a specialist, and when you can handle it yourself?
The decision to call a specialist depends on your skills and the type of fault. If the problem is a burnt out light bulb, poor plug contact, or the need for defrosting, you can handle it yourself. But if we are talking about opening the refrigeration circuit, replacing the compressor or looking for a leak, the risk is too great.
Modern refrigerators, such as Electrolux or Whirlpoolhave complex electronics. An error in the connection can damage the main control module, the cost of which reaches half the price of a new device.
A master is needed if:
- 🛠️ Welding of copper tubes and refilling with freon is required.
- 📉 There is a suspicion of a leak in the foamed part case.
- 🔌 The electronic control module is faulty (the board needs to be reprogrammed).
Remember that self-repair often voids your warranty. If the equipment is less than 3-5 years old, it is better to contact an authorized service center.
⚠️ Attention: Prices for repairs and availability of spare parts may vary depending on exchange rates and logistics. Before starting work, check the current cost of parts with suppliers or service centers.
Why does the freezer freeze only near the wall?
This is a classic sign of an incipient freon leak or a clogged system. The refrigerator tries to compensate for the lack of refrigerant by working at the limit, but there is not enough pressure to cool the entire volume of the evaporator. This may also be a consequence of the door not fitting tightly, which is why the warm air is cooled first at the outlet of the cold channel.
Is it possible to operate the refrigerator if it does not freeze?
For a short time - yes, for diagnostics. But long-term operation (more than a day) without cold is dangerous for the compressor, especially if the reason is a leak (no freon cooling of the motor) or a blockage (overload). Food cannot be stored in such a refrigerator due to the risk of bacterial growth.
How long should the freezer cool down after defrosting?
Usually the refrigerator gains temperature in 2-4 hours. Complete freezing of food can take up to 12-24 hours depending on the load size and the ambient temperature in the room. If after 5-6 hours of operation of the compressor the walls of the chamber remain warm, this is a malfunction.
What to do if the refrigerator does not turn on after defrosting?
Check the integrity of the cord and socket. Make sure the thermostat is not set to zero. If you hear a click, but there is no start, the start relay may have burned out. Let the equipment stand turned off for another couple of hours, perhaps the ice in the channels that is blocking the sensors has not completely melted.