Refrigerators Stinol have earned a reputation as reliable “workhorses” due to their simple design and affordable components. However, even time-tested equipment fails over time, and one of the most common problems is a violation of the temperature regime in the upper compartment. When the ice melts in the freezer and food begins to deteriorate, this is a signal of a serious failure in the refrigerant circulation or control system.
Owners often panic when they see running water or feel heat on the walls, but before calling a technician, it is worth carrying out an initial diagnosis. The malfunction can be caused by a simple capillary blockageand the failure of electronic components. Understanding the operating principle of your model will help save time and money by eliminating false service calls.
In this article we will analyze in detail all the possible reasons why the upper part stops cooling, and we will provide a clear algorithm of actions. The critical factor for Stinol models is the condition of the evaporator hidden behind the rear panel, which most often becomes the epicenter of the problem. We will analyze differences in diagnostics for No Frost and drip-type systems.
Specific operation of Stinol refrigerators and signs of malfunction
Refrigeration equipment Stinol, especially the 101, 102, 103 and 107 series, has its own design features. In models with a system No Frost the cold is distributed forcibly using a fan, while in classic versions natural convection or a drip system is used. If the upper chamber does not freeze, this almost always means that the cold simply does not reach the evaporator or is not produced in sufficient volume.
The first sign of trouble is often a change in the sound of the unit. The compressor may start working non-stop, trying to gain temperature, or, conversely, turn on extremely rarely. Warm condenser (grid at the back or side walls) with the engine running - this is a sure indicator that there is compression, but the refrigerant is not circulating through the system properly.
It is important to pay attention to the condition of the products and the presence of frost. In systems No Frost the complete absence of snow on the back wall of the freezer while the compressor is running indicates a freon leak. If you see a “coat” only in one corner or at the entrance to the chamber, and then there is a clean wall, this indicates a blockage or problems with defrosting.
⚠️ Attention: If you notice a strong smell of burnt wiring or a buzzing sound that turns into clicking sounds, immediately unplug the device from the network. Further operation in this mode may lead to the compressor burning out.
The main reasons for the lack of cold in the upper chamber
The list of potential culprits of the malfunction is quite wide, but 90% of cases occur in several key components. Refrigerant leak ranks first in the frequency of calls. Freon can escape through microcracks in the foamed part of the body or through solder joints in the circuit. In this case, the compressor hums constantly, but there is no cold anywhere, or it is weak.
The second most common cause is malfunction of the defrost system. In models No Frost the heating element, defrost thermostat or timer may fail. As a result, the evaporator becomes covered with ice, which blocks the air flow. The fan spins idle, driving warm air through the chamber, and the ice block interferes with heat transfer.
The third group of problems is related to electronics and sensors. Thermostat (or electronic control module) can “lie”, showing that the temperature is at normal when it's actually warm there. Also, the defrost sensor often fails, which does not give a command to turn on the heater.
- 🧊 Freon leak: The compressor is hot, the condenser is cold, there is no cold at all.
- ❄️ The capillary tube is clogged: The compressor is overloaded, gurgling is heard, the freezer freezes weakly or only at the entrance.
- 🔥 The defrost heating element is burnt out: Ice is frozen in the freezer, the fan is noisy or stopped by ice, the top does not cool.
- 🔧 The thermostat is faulty: The refrigerator either does not turn on at all or never turns off.
Mechanical damage is worth mentioning separately. If the refrigerator was recently transported or the door was slammed hard, the valve could be damaged or a crack in the circuit could form. Stinol sensitive to proper defrosting: using knives to chip ice often leads to the evaporator breaking and instant leakage.
Diagnostics of the No Frost system: heating element, timer and sensors
If your Stinol equipped with a system No Frostthen the lack of cold at the top when the compressor is running most often lies in a violation of the defrost cycle. Ice accumulating on the evaporator turns into a monolith that blocks the cold air supply channels. Diagnostics begins with a visual inspection after complete defrosting (at least 24 hours).
After defrosting, turn on the refrigerator. If the cold appears, but after a week or two the problem returns, the problem is definitely in the defrost unit. You need to make a call with a multimeter Heater heating element. Its resistance should be within normal limits (usually 200-400 Ohms). If the device shows a break (one on the screen), the heating element must be replaced.
Also checked defrost thermostat (the sensor that is on the evaporator tube). At room temperature it should be open, and when cooled (below -5...-10°C) it should close the circuit. If it is “stuck” in the open state, the heating command will never be received, and the ice will grow endlessly.
☑️ Checking the No Frost system
Don't forget to check the fan. If its blades are frozen to the body or frozen ice, the motor may burn out or jam. Some models Stinol have an asynchronous fan motor, which, when trying to rotate through the ice, produces a characteristic humming sound.
⚠️ Attention: Technical characteristics and location of parts may vary slightly depending on the year of manufacture and the specific modification of the refrigerator. Always check the diagram for your model before ordering spare parts.
Refrigerant problems: leaks and blockages
A situation where the refrigerator Stinol hums, but does not freeze, often indicates problems with the refrigerant circuit. Freon leak - this is not just a loss of gas, it is the entry of moisture and air into the system, which causes corrosion and acid reactions. It is difficult to determine a leak visually, since the gas is colorless and odorless.
Diagnostic sign of a leak: when the compressor is running (it may be hot), the condenser (grid at the back or side walls) remains cold or warm only at the beginning. Clogged capillary tube manifests itself differently: the compressor operates very loudly, with overheating, and in the area after the filter-drier a sharp cooling or even frost may be observed, while further down the tubes are warm.
The treatment for both cases is the same - call a specialist with equipment. Required:
1. Finding a leak or purging the system.
2. Replacing the filter drier (required!).
3. Evacuating the system.
4. Refilling with new freon in strict accordance with the weight indicated on the nameplate.
Is it possible to refuel the refrigerator yourself?
Independent refueling without a vacuum sealer and scales is almost impossible. You will not be able to remove moisture from the system, which will lead to rapid compressor failure due to water hammer or capillary blockage with ice.
Attempts to “top up” gas without eliminating the leak give only a temporary effect. After a month or two, the problem will return, but by this time the compressor may already have failed due to wear and tear. Therefore, if you suspect a leak, it is better not to delay repairs.
Faults of the compressor and start relay
The compressor is the heart of the refrigerator. In Stinol reliable motors Danfoss or Atlantwere often installed. However, they also have their resources. If you hear that the motor is trying to start, clicks and turns off after a few seconds, the problem is most likely in starting relay or thermal protection relay.
These parts are inexpensive and easy to change. Remove the back cover, disconnect the relay from the compressor and shake it. If a ringing sound is heard inside (as if from a broken stone), it means that the trigger element is destroyed. Replacing the relay often revives an old refrigerator.
It is worse if the compressor itself fails. This may be an interturn short circuit of the windings or mechanical wear (knocking, grinding). In this case, repairs are not economically feasible, since the cost of a new compressor and work to replace it (soldering, refilling) is a significant part of the price of a new refrigerator.
| Symptom | Probable cause | Difficulty of repair | Required tools |
|---|---|---|---|
| The compressor clicks and does not start | Start relay | Low | Screwdriver, multimeter |
| Freezer in ice, top warm | Defrost system (heating element, sensor) | Medium | Multimeter, hair dryer |
| Humming, but no cold nowhere | Freon leakage / Clogging | High | Vacuumator, pressure gauges |
| Strong knocking and vibration | Wear compressor | Replacing the unit | Soldering kit, burner |
Electronic control module and thermostat
In more modern models Stinol and modifications with electronic control, the unit is responsible for the temperature management. If the display shows an error or chaotic symbols, or if the refrigerator behaves inappropriately (for example, it turns off when it should be freezing), it is worth checking electronic module.
Often the cause is oxidation of contacts or a power surge in the network. Visually, swollen capacitors or traces of burning may be visible on the board. Repairing the module requires soldering and circuit design skills, or replacing the entire unit.
In models with a mechanical thermostat (twist inside) the problem is simpler. If you do not hear a click when you turn the knob, or if the refrigerator does not respond to changes in the position of the control, the temperature sensor is faulty. Replacing it takes 15-20 minutes.
Operation rules for extending the life of Stinol
To ensure that the upper chamber of your refrigerator always freezes, and repairs are not required for decades, it is important to follow simple operating rules. Do not overload the freezer with food, leave space for air circulation. This is especially critical for the system No Frost.
Carry out preventive defrosting regularly (once a year), even if you have No Frost. This will help remove a microscopic layer of ice from hard-to-reach places and give the compressor a rest. Keep the rear of the condenser clean: dust and animal hair act like a blanket, causing the motor to wear out.
Check the door for tight fit. If the elastic seal tears or loses its elasticity, warm, moist air constantly enters the chamber. This leads to increased ice formation and overload of the defrosting system.
Why does the refrigerator freeze only after complete defrosting?
This is a classic sign of a malfunction of the defrost system in No Frost models. Ice gradually accumulates on the evaporator, blocking the air flow. After defrosting, the ice melts, the channels are freed, and the cold begins to enter the chamber again. It is necessary to change the heating element, defrost sensor or timer.
How long should the refrigerator cool down after defrosting?
After turning on the empty refrigerator Stinol it should gain temperature within 2-4 hours. Complete freezing of food in the freezer occurs in 6-12 hours. If the walls of the freezer remain warm after 5-6 hours of operation of the compressor, there is a malfunction.
Is it possible to use the refrigerator if it does not freeze on top?
For a short time - yes, if the compressor does not overheat. However, storing perishable food in the upper chamber will no longer be possible. Long-term operation in this mode is dangerous for the compressor, since it can work non-stop, trying to reach the set temperature.
How to check if the fan is working in Stinol No Frost?
Open the freezer door. In most models, when the door is opened, the fan should stop (the limit switch is activated). If, when the door is closed, you do not hear the noise of a running fan, but hear the hum of the motor, the fan may be frozen or broken.