The situation when you open the refrigerator door and it’s warm inside always causes panic. Products can deteriorate in a matter of hours if the unit no longer performs its main function. You can understand that the refrigerator does not freezenot only by the air temperature, but also by a number of indirect signs that appear long before the operation completely stops.
Often owners of household appliances notice the problem too late, when the compressor has already failed or an ice plug has formed in the system. It is important to learn how to read the signals that the device gives to prevent costly repairs or loss of food stock. In this article we will look in detail at how to carry out initial diagnostics and distinguish a minor malfunction from a serious breakdown.
Modern models Indesit, Atlant or Bosch can behave differently when failures occur. Some make strange noises, others simply stop switching off. Your task is to notice these changes in the operation of the equipment in a timely manner.
The first thing that catches your eye when the temperature regime is violated is the condition of the products. If the milk sours quickly and the ice cream has become soft, it means that the temperature inside the chamber is significantly higher than the required values. However, relying only on this is dangerous, since the spoilage process can begin long before you notice it.
Pay attention to condensation on the inner walls. In a working refrigerator with a drip defrosting system, moisture should collect in the groove and not flow down the entire back wall or accumulate on the shelves. Excess moisture is the first sign that the cooling cycle is broken.
⚠️ Attention: If you notice that a puddle has appeared on the floor under the refrigerator, do not ignore it. This may not just be a forgotten glass of water, but a sign that the condensate drainage system is clogged or defrosting is not proceeding correctly.
The temperature regime directly depends on the operation of the evaporator. If it is covered with an uneven layer of frost or, conversely, is completely clean when the compressor is running, this is a clear sign of a malfunction. Normally, the heat exchanger should cool evenly over the entire surface.
Another important indicator is cyclical operation. A working unit operates intermittently: it turns on, cools the chamber to the set temperature and turns off. If the motor hums without a break or, on the contrary, is silent for too long, it is worth carrying out a deeper check.
Visual signs of malfunction
Visual diagnostics are the easiest way to understand what the refrigerator has stopped freezing. You do not need special tools, just carefully inspect the interior and external elements of the device. Often the problem is visible to the naked eye if you know where to look.
Pay attention to ice coat. In modern No Frost systems it should not exist at all. If you see ice build-up on the door, food, or back wall, the defrost system or defrost sensors are not working properly. In older models with a drip system, light frost is allowed, but not a thick layer of snow.
Check the rubber seals on the doors. If they do not fit tightly, warm air constantly enters the chamber, and the refrigerator does not have time to cool it. This leads to increased compressor operation and eventual breakdown. Deformation or dirt on the elastic is a common reason that the device does not keep the cold.
- 🧊 The appearance of a snow coat in only one corner of the chamber.
- 💧 Puddles of water on the shelves or under the vegetable drawers.
- 🚪 Door does not close tightly the first time or comes off on its own.
- 🌡️ A noticeable temperature difference in different zones of the same chamber.
Inspect the back wall of the refrigerator. If it is swollen or shows signs of corrosion, the problem may be a refrigerant leak or damaged insulation. In such cases, DIY repairs may be ineffective, and you will need to call a specialist.
Do not forget about lighting. If the light inside is on when the door is closed (this can be checked by opening the door slightly in the dark), this creates an additional source of heat. Although one lamp is not capable of defrosting the chamber, in combination with other factors this can disrupt the operation of thermostat.
It is also important to check the condition of the products. If the vegetables in the bottom drawer begin to freeze, but the top shelf is warm, it means that air circulation is impaired. This often happens if food is placed too tightly or blocks the ventilation holes.
Acoustic diagnostics: sounds of a working and faulty refrigerator
The sound of a refrigerator operating can tell you no less about its condition than a visual inspection. An experienced technician can determine the degree of wear of parts by the hum of the engine. For the average user, it is important to know which sounds are normal and which signals trouble.
The norm is the smooth, monotonous hum of a working compressor. From time to time, the sound of flowing liquid (freon) can be heard - gurgling or quiet hissing. The thermal relay may also click when turning the motor on and off. These sounds should not be scary.
You should sound the alarm if you hear:
- 🔊 A loud knocking or clanging sound when starting the engine.
- 📢 A prolonged whistle or hissing that lasts constantly.
- 🔨 Rhythmic beats, similar to the operation of a hammer drill.
- 🤐 Complete absence of operating sounds (silence) when the lights are off.
If the refrigerator is humming, but not freezing, this may mean that the compressor is running idle. Often this situation occurs when there is a freon leak: the motor is trying to create pressure, but the gas has escaped through a microcrack. In this case, capacitor (grid at the back) may be barely warm or cold, although the motor is hot.
⚠️ Attention: If you hear a loud bang or crackling noise, accompanied by a burning smell, immediately unplug the appliance. This may indicate a short circuit in the wiring or combustion of the motor winding.
Sometimes extraneous sounds are not produced by the unit itself, but by its interaction with the environment. Check that the refrigerator is not touching a wall or furniture. The vibration of a running motor can be transmitted to the housing and cause rattling. Move the equipment a couple of centimeters from the wall to ensure normal ventilation.
In models with the system No Frost sometimes you can hear the sound of a running fan. If it starts to hum or squeak, it means the bearings are worn out or the blades are touching ice. This disrupts the circulation of cold air, and the freezer stops freezing.
Analysis of the operation of the compressor and motor
The compressor is the heart of the refrigerator. It is he who is responsible for the circulation of refrigerant throughout the system. If you have determined that The refrigerator is not freezing, first of all you need to understand whether this node is alive. Diagnosing the motor requires caution, as some of its parts can heat up to high temperatures.
Touch the side walls of the case (where the motor is hidden) or the rear grille. They should be warm or even hot when the compressor is running. If the engine hums but remains cold, this is a sure sign that freon is not circulating. There may be clogging of the capillary tube or a gas leak.
Pay attention to the operating modes. The motor should turn on and off. If it runs continuously for more than 12-15 hours without a break, trying to get the temperature up, it overloads the system. In such a situation, the refrigerator may freeze, but very weakly, and the engine resource will be exhausted in a matter of days.
☑️ Compressor diagnostics
The opposite situation also happens: the motor is silent. If there is voltage in the network, the light inside is on, and there is dead silence, the starting relay or the compressor itself may have burned out. Sometimes the problem is more trivial - the thermostat setting has gone wrong, and it simply does not give the command to start.
In inverter models Samsung or LG diagnosis is more complicated. They do not make loud clicks when starting, but gradually gain momentum. If such a refrigerator has stopped freezing and is silent, diagnostics of the electronic control module is most often required.
It is important to understand the difference between working in the heat and breaking down. In the summer, when the apartment is +30°C, the refrigerator may work longer than usual. But if it doesn’t turn off for days and doesn’t cool, it’s not the climate, but a malfunction.
Checking the defrosting system and sensors
In refrigerators with a system No Frost the serviceability of the defrosting system is critically important. It consists of a heating element (heater), a defrost sensor and a timer or electronic module. If one of these elements fails, the evaporator becomes overgrown with ice, which blocks the cold air supply channels.
How to understand that the problem is in defrosting? The refrigerator may freeze, but very weakly, or the cold will only be near the back wall, and it will be warm on the shelves. In this case, a strong snow build-up may be observed in the freezer compartment, especially around the fan.
Main symptoms of system malfunction defrosting:
- ❄️ A thick layer of ice on the back wall of the freezer.
- 💨 A barely noticeable flow of air blows from the fan or does not blow at all.
- 🔊 You can hear the fan cracking, touching the ice.
- 🌡️ The temperature in the chambers fluctuates (floats) for no apparent reason.
To check, you can completely defrost the refrigerator manually. Leave the doors open for at least 24 hours (preferably overnight). If, after connecting to the network, the refrigerator started working normally and began to freeze, then the problem is definitely in the defrosting system (the heating element or sensor burned out).
Why can’t you chip off ice with a knife?
Mechanical removal of ice with sharp objects often leads to a puncture of the evaporator. In modern refrigerators, the evaporator tubes are built into the wall, and their repair is extremely difficult and expensive.
The temperature sensor also plays a key role. If he “lies” and sends a signal to the control module that it is already -20°C in the chamber, although in fact it is +5°C, the compressor simply will not turn on. You can only check the sensor with a multimeter by measuring its resistance at different temperatures.
Table of common symptoms and causes
For ease of diagnosis, we have compiled a summary table. It will help you compare the symptoms you observe with the most likely causes of the problem. Remember that an accurate diagnosis can only be made by a specialist with equipment.
| Symptom | Probable cause | Difficulty of repair | Can I fix it myself |
|---|---|---|---|
| The engine is humming, but no cold | Freon leak or blockage | High | No, we need a technician |
| The refrigerator is silent and the light is not on | No power, burnt out socket | Low | Yes, check the plug |
| Ice only in the freezer, warm in the refrigerator | System malfunction No Frost | Medium | Partially (defrosting) |
| The compressor turns on and immediately turns off | Faulty start relay | Medium | Yes, if you have the skills |
| Water and food are floating inside | The drainage hole is clogged | Low | Yes, clean with a brush |
The table shows that some problems, such as clogged drain, can be solved simply. Others, such as a refrigerant leak, require evacuation of the system and refilling with gas, which is only possible at a service center.
Do not try to open the sealed parts of the system yourself or change the compressor without the appropriate experience. This can lead to final breakdown of the unit and loss of warranty.
What to do first: algorithm of actions
If you understand that the refrigerator has stopped freezing, do not immediately panic or call service. Follow a few simple steps that will help eliminate common mistakes and, perhaps, resuscitate the equipment without calling a technician.
The first step is defrosting. Even if you don't see ice, moisture may have accumulated inside the channels. Unplug the refrigerator, remove all food, and leave the doors open for 24 hours. Place rags as there may be a lot of water. This action helps in 30% of cases, especially with problems with the No Frost system.
After defrosting, turn on the device and let it work for a couple of hours without loading food. Check if the cold has appeared. If so, the problem was an ice jam. If not, check the settings.
Check the position of the temperature regulator. Perhaps one of the household members accidentally moved the wheel to the “minimum” position or turned off the super-freeze mode. For electronic models, reset the settings to factory settings if the instructions allow this.
⚠️ Attention: Do not use hair dryers, hot water or sharp objects to speed up defrosting. Sudden temperature changes can cause cracks in the plastic or deformation of the evaporator tubes. Patience is your best tool.
If, after defrosting and checking the settings, the refrigerator still does not freeze, and the motor behaves strangely (does not turn on, runs continuously, makes strange sounds), you need to call a specialist. Further operation can lead to combustion of the compressor, the replacement of which is very expensive.
Remember that timely contact with professionals often saves your budget. The technician will arrive with a pressure gauge and a tester and will accurately determine the pressure in the system and the condition of the electrical circuits.
Frequently asked questions (FAQ)
Why does the refrigerator freeze but does not turn off?
This can happen for several reasons: freon leak (the compressor is trying to compensate for the lack of cold), wear of the door seal (warm air enters), malfunction of the thermostat (does not give a signal to turn off) or operation in conditions of increased ambient temperature.
Is it possible to operate a refrigerator if it does not freeze well?
For a short time - yes, but not recommended. Products may deteriorate, and the compressor will work against wear and tear, which will lead to its rapid failure. It is better to find out the reason for poor cooling.
What to do if it is warm in the refrigerator and ice in the freezer?
Most likely, the air circulation between the chambers is impaired. Check whether the air passage hole is not clogged with food. Also, the reason may be a malfunction of the damper or fan of the No Frost system.
How to understand that the compressor has burned out?
If you hear a click when you turn it on, the motor tries to start (it buzzes for a second) and clicks again, turning off - probably the start relay has burned out or the compressor itself has jammed. If the motor is hot but silent, this is also a bad sign.
Does the amount of food affect the operation of the refrigerator?
Yes. An empty refrigerator is unstable, since food acts as cold accumulators. However, if there are too many products and they block the ventilation holes, circulation is disrupted and the cold is not distributed evenly.