The situation when the refrigerator stops freezing properly always takes you by surprise. The food begins to deteriorate, and an unpleasant odor appears in the chamber. This is not just a household inconvenience, but a signal that there has been a malfunction in the operation of the refrigeration circuit refrigeration circuit
Before you panic and call a technician, you should carry out the initial diagnostics yourself. Often the reason lies in trivial things that can be fixed in a matter of minutes without special tools. However, ignoring the symptoms can lead to failure of an expensive compressor.
In this article we will analyze in detail the mechanics of the unit, list typical faults and explain how to determine the nature of the breakdown based on indirect signs. You will find out why Indesit or Bosch can behave differently in similar situations, and when DIY repairs are no longer possible.
Primary diagnosis and simple reasons
If the refrigerator turns on, the light is on, but there is no cold, first check the thermostat. It may have been accidentally moved to the “minimum” or “0” position. Make sure that the equipment is connected to a network with sufficient voltage, since at low readings electric motor it may hum, but not start.
The second important stage is checking the tightness of the door. Rubber seal over time it dries out, cracks, or simply becomes contaminated with food debris. Through the formed cracks, warm air constantly flows inside, causing the unit to work for wear, but not to reach the desired temperature.
⚠️ Attention: If, during inspection, you find that the door is skewed and does not fit tightly, do not try to forcefully slam it. This can damage the hinges or permanently deform the sealing rubber.
It is also worth paying attention to the location of the equipment. If the refrigerator is located close to the wall or in a niche without a gap for ventilation, condenser (the grille at the back) cannot effectively release heat. This leads to overheating of the system and reduced cooling efficiency.
Check whether air access inside the chamber is blocked. If you pack the shelves too tightly with products, especially at the back wall, the circulation of cold air is disrupted. In single-compressor models, this is especially critical, since cold air must flow freely from the freezer to the refrigerator compartment.
Problems with the defrosting system and ice freezing
One of the most common reasons why a refrigerator does not freeze well is the formation of a “snow coat” on the evaporator. In modern models with the system No Frost a special heating element, timer and sensor are responsible for defrosting. If any of these elements fails, the ice does not melt, but grows, blocking air circulation.
In units with manual defrosting, the situation is similar, but the process is slower. A thick layer of ice on the back wall acts as a heat insulator, preventing food from cooling. In this case evaporator physically cannot remove heat from the chamber.
- ❄️ Signs of malfunction: a thick layer of ice or frost is visible on the back wall, even if you have not defrosted the equipment for a long time.
- 🔊 Signs of a malfunction: the cracking of ice is heard or the humming becomes more intense due to the load on the fan.
- 💧 Signs of a malfunction: water appears under the refrigerator or inside the chamber, which has nowhere to go.
To solve the problem, complete defrosting is often required. Unplug the appliance, open the doors and leave it for at least 12-24 hours. It is important to wait for the ice to completely melt in hard-to-reach places where the fan and air ducts are located.
☑️ Correct defrosting algorithm
If after After defrosting, the refrigerator started working normally, but after a week or two the situation repeated itself, which means the automatic defrosting system is faulty. It is necessary to replace the evaporator heating element, defrost sensor or fuse.
Faults of the compressor and start relay
The heart of the refrigerator is the compressor. If it is faulty, you can forget about the cold. However, a breakdown does not always mean a complete replacement of the unit. Sometimes the problem lies in starting relaywhich supplies a starting impulse to the engine.
Signs of a relay malfunction often manifest themselves in a characteristic sound: the refrigerator hums for a few seconds, then a click is heard and the motor goes silent. After some time, the cycle repeats. This means that the compressor is trying to start, but the relay cannot complete the circuit or protect the windings from overload.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Buzzing, clicking, does not start | Faulty starting relay | Low (part replacement) |
| Humming, hot, does not start | Compressor jammed | High (compressor replacement) |
| Works constantly, without turning off | Freon leakage or wear | Average (search for leaks, refilling) |
| Strong vibration and noise | Unbalance or shock absorbers | Medium (adjustment) |
If the compressor itself is hot, hums, but does not start, or starts and immediately stalls, there may be a breakdown of the winding or mechanical jamming of the piston group. In such cases diagnostics requires measuring the resistance of the windings with a tester.
⚠️ Attention: Replacing a compressor or start relay requires skills in working with electricity and refrigerants. Inexperienced intervention can lead to a short circuit or damage to the pipelines.
It is worth noting that in inverter models, such as some series LG or Samsung, there is no starting relay in the classical sense. The start-up is controlled by an electronic module, and diagnostics here are more complicated and require checking control signals.
Refrigerant leakage and capillary system blockage
Refrigerant (freon) is a working fluid that circulates through the system, transferring heat. If its quantity decreases due to microcracks in the tubes or corrosion, the cooling efficiency decreases. The refrigerator begins to work non-stop, trying to gain temperature, but it freezes less and less.
Leaks often occur at soldering points, in the foamed part of the case (where the pipes approach the evaporator) or in the condenser if it is damaged by rust. It is difficult to detect a leak visually, since freon is colorless and odorless. An indirect sign is the absence of a characteristic hiss when punctured (if you did this) or oily spots at the joints of the tubes.
Why can’t you just add freon?
Simply refilling freon without finding and eliminating the leak is a temporary measure. The gas will escape through the crack again, and the compressor, running idle without proper oil cooling, can burn out. In addition, mixing different types of refrigerants is unacceptable.
Clogged capillary tube is the second common circuit problem. An ice or oil plug may form in the system, preventing circulation. The symptoms are similar to a leak: the compressor works, but there is no cold, and the condenser (grid at the back) may be only partially cold or warm.
To eliminate these faults, you need to call a technician with specialized equipment: a vacuum pump, a pressure gauge station and a burner. It is almost impossible to “blow out” the system on your own or solder a microcrack in the foamed part.
Improper operation and external factors
Often users themselves create conditions under which the refrigerator cannot function normally. For example, loading hot products. If you put a pot of soup in the chamber, the temperature inside will rise sharply, and the unit will take a long time to reach the operating mode, creating the illusion of a breakdown.
Another factor is seasonality. In winter, if the refrigerator is placed on an unheated veranda or balcony, the oil in the compressor thickens and it may not start. In summer, when the room temperature is above +30°C, it is difficult for equipment to give off heat, and it may work intermittently.
- 🌡️ Temperature conditions: optimal room temperature is from +16°C to +32°C.
- 🍲 Hot food: cool food to room temperature before loading.
- 🧊 Load volume: do not fill the chamber more than 70% at a time.
It is also worth checking whether the food is blocking the ventilation holes inside the chamber. In models with No Frost the air duct damper may become stuck in the closed position due to frozen ice or a mechanical obstruction, and the cold simply will not flow into the main compartment.
Failures in the electronic control module
In modern refrigerators, the electronic one is responsible for all processes. control module. It reads temperature sensors and gives commands to the compressor, fan and heating elements. If the “brain” of the equipment is faulty, it may behave inappropriately.
Symptoms of module failure are varied: spontaneous switching on and off, incorrect display of temperature on the display, refusal to carry out user commands. This often happens after power surges in the network.
In some cases, a reboot helps: disconnecting from the network for 15-20 minutes. If the problem is a software glitch, this may return the system to normal. However, if the board elements are burned out, professional repair or replacement of the module will be required.
⚠️ Attention: Electronics are sensitive to humidity. If you notice condensation inside the case or on the board, do not turn on the device. First you need to dry the equipment and find a source of moisture.
It is worth considering that manufacturers regularly update the software for their devices. In rare cases, especially for “smart” refrigerators with Wi-Fi, flashing may be required, which is best entrusted to an authorized service.
Frequently asked questions (FAQ)
Why does the refrigerator freeze only after a long defrost?
This is a classic sign of a malfunction of the defrost system. Most likely, the evaporator heating element has burned out, or the defrost sensor or timer is faulty. Ice builds up inside the housing, blocking the air passages. After defrosting, the channels are freed, and the cold begins to circulate again until the ice builds up again.
Is it possible to operate a refrigerator if it freezes slightly?
For a short time - yes, but not recommended. Long-term operation in this mode leads to overheating of the compressor, as it works non-stop. This significantly reduces its resource. In addition, bacteria can multiply in the chamber, which is dangerous to health.
How long should a new refrigerator reach its temperature?
After the first turn on without load, the refrigerator takes from 2 to 6 hours to reach operating mode. If you loaded it with products at once, the time can increase to 12 hours. If after a day the temperature has not dropped below +10°C, this is a cause for concern.
Does the amount of freon affect how the refrigerator freezes?
Yes, directly. Freon is a coolant. If there is little of it (leakage), the heat is not removed effectively. If the system is over-pumped (which happens after unqualified repairs), this also disrupts the heat exchange cycle and can lead to liquid freon entering the compressor, which will cause its breakdown.
What to do if it is warm in the refrigerator compartment, but normal in the freezer?
In two-chamber models, this often indicates a problem with air circulation (the channel is clogged ice), a malfunction of the air flow control damper or, in single-compressor models, a freon leak (it does not reach the evaporator of the refrigeration chamber).