A situation when a refrigerator suddenly stops freezing can cause panic in any home cook, because food supplies are at risk, and the risk of property damage is growing every minute. Fault diagnosis requires composure and a consistent approach, since chaotic actions can only aggravate the situation or lead to unnecessary financial costs. Before calling a technician or trying to disassemble the unit, it is necessary to conduct an initial visual inspection and exclude trivial causes, such as lack of electricity or a loosely closed door.
Often owners Indesit, Atlant or Beko face the fact that the equipment I’m just “tired” of working for a long time without defrosting, which is the most common reason for the lack of cold. In this case compressor it can work continuously, trying to catch up with the temperature, but due to the ice coat on the evaporator, the cold simply does not enter the chamber. It is important to understand the difference between a complete absence of cold and insufficient cooling, since this radically changes the vector of searching for the problem.
If you notice that the unit turns on, hums, but does not cool, or, conversely, is silent and does not respond to being connected to the network, the algorithm of actions will be different. In this article we will analyze in detail the main cooling system malfunctions, methods for identifying them and the possibility of eliminating them yourself, so that you can make an informed decision on further actions.
Primary diagnosis: checking the obvious
The first step in finding an answer to the question why the refrigerator does not freezeshould be to check the simplest things that are often overlooked in a hurry. Make sure that the plug fits tightly into the socket and that the voltage itself is correct, as surges can blow fuses or damage electronics. Sometimes the problem lies in the fact that the temperature regulator was accidentally moved to the "0" or "Off" position while cleaning or loading food.
Pay attention to how it behaves compressor: if it is silent, but the light inside is on, the thermal protection relay may have tripped or failed trigger mechanism. In cases where the motor hums, but clicks and turns off after a few seconds, we are talking about an attempt to start, which is blocked by a malfunction. Thermostat can also be the reason for the silence of the unit if it does not give a signal to turn on the motor due to a sensor failure.
- 🔌 Check the presence of voltage in the outlet using another electrical appliance to eliminate problems with the wiring.
- ❄️ Make sure that the temperature regulator is set to operating mode, and not to the minimum value or defrosting.
- 🚪 Inspect the rubber seals on the doors: if they do not fit tightly, it is cold will go away, and the motor will not be able to cope with the load.
- 💡 Listen to the operation of the motor: silence, humming or characteristic clicks will indicate different parts of the breakdown.
⚠️ Attention: If you smell burning or see sparking in the compressor area, immediately unplug the device and do not try to turn it on again until a specialist arrives.
Problems with the No Frost system and defrosting
Modern models, such as Samsung, LG or Bosch, are often equipped with a system No Frostthat automatically removes moisture and prevents the formation of ice. However, it is this system that tends to break down, which leads to ice fouling on the evaporator and stopping the circulation of cold air. When Defrost heating element fails, the ice blocks the ventilation ducts, and the cold stops flowing into the main chamber, although it may be relatively normal in the freezer.
You can diagnose this problem by paying attention to the back wall of the refrigerator compartment: if it is covered with snow or, conversely, completely dry when the engine is running, this is a sure sign of a failure. It is also worth checking defrost timer or the electronic control module, which could “freeze” or burn out, ceasing to issue defrosting commands. In such cases, it is often necessary to completely defrost the unit during the day to remove the ice plug.
- 🌬️ Check the operation of the fan: if it does not spin, air will not circulate through the chambers.
- 🔥 Check the defrost heating element with a multimeter for a break. chain, which is a common reason for defrosting to stop.
- 💧 Inspect the drainage hole for blockages, which can cause water accumulation and subsequent freezing.
How to defrost a refrigerator correctly?
Unplug the appliance, open the doors and leave it for at least 12-24 hours. Do not use a hairdryer or hot water to speed up the process, as sudden temperature changes may damage the plastic or evaporator tubes. Place rags for draining water.
Malfunctions of the compressor and start relay
Compressor is the heart of the refrigerator, and its malfunction most often leads to a complete lack of cold. If the engine tries to start, hums, but then clicks and goes silent, most likely the problem lies in the start relay or the compressor itself. A relay is an inexpensive part that you can replace yourself, while replacement or overhaul motor-compressor requires specialized equipment and skills.
In some cases, the compressor operates continuously without shutting down, but does not create required pressure in the system. This may indicate loss of compression when the piston group is worn out and cannot compress effectively. In such a situation, even if the electrics are working properly, there will be no cold, since the physics of the process is broken. refrigerant. In such a situation, even with working electrics, there will be no cold, since the physics of the process is broken.
- 🔨 Gently tap on the compressor housing (not too hard!), sometimes a jammed mechanism may "move away."
- ⚡ Check the start relay for carbon deposits or cracks, replacing it with a known good one for testing.
- 🌡️ Measure the temperature of the compressor housing: if it is icy or barely warm during operation, there may be no freon.
☑️ Compressor diagnostics
Refrigerant leak and capillary blockage tubes
One of the most difficult problems to fix on your own is freon leakage clogging capillary tube. Freon is the working fluid of the refrigerator, and if its quantity in the system decreases, the cooling efficiency drops to zero. Leaks often occur in the foamed part of the housing or in solder joints, which makes them invisible to the eye, but obvious in their consequences.
Clogged capillary tube usually occurs due to moisture in the system or oxidation products that block the flow of refrigerant. In this case condenser (the grill at the back) may only be hot at the beginning or be cold, and the compressor will work with overload. To eliminate these problems, you need to call a specialist with special equipment for vacuuming and filling the system.
⚠️ Attention: An independent attempt to solder tubes or fill with freon without a vacuum degasser and a pressure gauge station is almost guaranteed to lead to damage to the compressor and the final failure of the equipment.
Comparative table of symptoms and causes
To more accurately determine the malfunction, it is convenient to use a summary table that compares visible symptoms with probable causes. This will help narrow down the search and understand which unit requires attention first.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The compressor is silent, the light is on | Thermostat or control module is faulty | Medium |
| Humming, clicking, does not start | Start relay or compressor wedge | Low/High |
| Works, but does not freeze, the condenser is cold | Freon leakage | High (needs a technician) |
| Freezes slightly, ice freezes | Malfunction of the defrost system (No Frost) | Medium |
| Very noisy, vibration | Wear of shock absorbers or problem with fastening | Low |
Analyzing the table data, you can see that electrical faults can often be repaired with your own hands, while problems with a sealed circuit require qualifications. Diagnostics should be carried out methodically, eliminating simple options before moving on to complex ones.
When you need to call a professional masters
Despite the desire to save money, there are situations when opening a sealed circuit or complex electronic diagnostics are impossible at home. If you have identified a leak, a breakdown in the compressor windings, or a malfunction of the inverter module, the best solution would be to contact a service center. Professionals have access to original spare parts and tools necessary for high-quality repairs.
It is also worth considering calling a specialist if, after replacing the relay or thermostat yourself, the situation has not changed. This may mean that the problem lies deeper, and further experiments may lead to complete failure of the unit. Remember that the cost of incorrect repairs often exceeds the price of new equipment.
- 🛠️ The lack of the necessary tools (vacuum pump, burner, leak detector) makes repairing the circuit impossible.
- 📜 Having a warranty on the device requires contacting only an authorized service center, otherwise the warranty will expire.
- 🧠 Complex electronic control boards require special knowledge and circuits for diagnostics.
Prevention and operating rules
To The question “why the refrigerator doesn’t freeze” has not arisen before you regularly, it is important to follow the rules for operating the equipment. Regular defrosting (even for the No Frost system once a year), keeping the condenser clean and checking the seals will help prolong the life of the unit. Prevention is always cheaper and easier than major repairs.
Do not put hot foods in the chamber and do not open the door for a long time unless necessary, as this puts excess load on the compressor. Taking good care of your equipment is the key to its long and trouble-free service, allowing you to avoid sudden breakdowns at the most inopportune moment.
Is it possible to repair a refrigerator yourself without experience?
Basic operations, such as replacing a thermostat, relay or seal, are available to a beginner with a set of tools. However, work related to freon, soldering tubes and complex electronics require special knowledge and equipment, so it is better to entrust them to professionals.
How long should the refrigerator sit after transportation before turning it on?
If the refrigerator was transported in a vertical position, 2-4 hours is enough. If it was lying, you need to wait at least 8-12 hours (and in winter up to 24 hours) so that the oil flows into the compressor and does not enter the circulation circuit.
Why does the refrigerator freeze but does not turn off?
Most often this indicates a malfunction of the thermostat, which does not give a signal to stop the compressor, or a freon leak, because of which the temperature in the chamber does not reach the set value, and the motor runs idle.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require regular defrosting to remove ice, but once every 6-12 months it is recommended to carry out a complete defrosting and washing for hygiene and checking the operation of the drainage system.