Owners of household appliances Stinol they are often faced with the need to restore the functionality of units, especially considering that the production of these models has been discontinued, and there are fewer original spare parts. Self-repair of a Stinol refrigerator is a real opportunity to save a significant amount, since calling a technician with diagnostics can cost up to half the price of a new part. Many faults, such as failure of a thermostat or start relay, do not require specialized tools and can be performed in a home workshop.
Before taking active steps, it is necessary to conduct a thorough visual and auditory diagnosis. Initial inspection allows you to identify obvious mechanical damage or problems with the power supply. It is important to understand that modern and old models Stinol may have different control schemes, but the basic principles of operation of the compressor and heat removal system remain similar. If you are not confident in your abilities when working with electricity, it is better to stop at this stage.
In this article we will look at the most common breakdowns and algorithms for eliminating them. We will look at how to replace thermostat, clean the condensate drainage system and check the serviceability of the motor-compressor. The right approach to repair will extend the life of your refrigerator for several more years, keeping food fresh.
Diagnostics of major faults
The first step in restoring the unit's performance is to accurately determine the symptom. The refrigerator may hum, but not cool, or, conversely, work without stopping, freezing food. Diagnostics begins with an analysis of the behavior of the equipment in the first minutes after switching on. If the engine starts for a couple of seconds and stalls with a click, most likely the problem lies in the start relay or the compressor itself.
A frequent problem for models Stinol 101 and Stinol 103 is incorrect operation of the system defrosting. In this case, a “fur coat” grows on the back wall of the freezer compartment, and in the refrigerator compartment the temperature rises above normal.
⚠️ Attention: If you find that the back wall of the refrigerator compartment is covered with ice and there is water below, do not try to immediately chip the ice with a knife - this may damage the evaporator.To accurately determine the unit that requires replacement, you often have to disassemble the back panel of the freezer.
When diagnosing electrical parts it is extremely important to use a multimeter. Testing the circuits allows you to identify breaks and short circuits. Electrical diagram refrigerator Stinol is usually pasted on the inner wall or is in the instructions, which greatly simplifies the search for contacts for testing. If you do not know how to use a tester, it is better to contact a specialist, since an error can lead to combustion of the compressor.
Replacing the thermostat and sensors
Thermostat (thermostat) is a device that controls the temperature inside the chambers and sends a signal to turn on or off compressor. In refrigerators Stinol these elements often fail, which leads either to a complete stop of the unit (if the circuit is broken) or to its continuous operation. Replacing a thermostat is one of the simplest operations, accessible even to beginners.
First you need to remove the plastic cover that hides the regulator. It is usually secured with latches or a single screw. After dismantling the handle and cover, you will see the thermostat itself with the wires suitable for it. Important to remember the order of connecting the wires or take a photo of the circuit before disconnecting, so that when assembling a new element you do not confuse the contacts.
- 🔧 Disconnect the refrigerator from the power supply and remove the back cover in freezer (if the thermostat is built into the wall).
- ❄️ Carefully remove the thermostat sensitive tube from the evaporator without bending it.
- 🔌 Disconnect the wires from the old thermostat and install a new one, observing the markings.
After installation of a new one thermostat it is necessary to check the tightness of the sensing tube. If it does not fit tightly, the temperature readings will be incorrect and the refrigerator will not operate properly. Electronically controlled models instead of a mechanical thermostat use sensors whose resistance changes depending on the temperature. They are checked with a multimeter in resistance measurement mode.
Repair of the No Frost and defrost system
Refrigerators Stinol with a system No Frost require special attention to the evaporator defrost unit. If the fan is humming, but no cold is entering the chamber, and ice is visible on the evaporator, it means that the defrost cycle is broken. The main culprits here are the heating element (heater), defrost timer or thermal fuse. In modern models, these functions can be performed by an electronic control module.
The check begins with a visual inspection of the heating element for visible damage. However, most often the spiral inside is intact, but there is no contact. Checking the heating element a multimeter should show a resistance within a few hundred Ohms. If the device shows a break (one on the screen), the heating element must be replaced. Also, the thermal fuse, which is in series with the heating element, often blows out.
| System element | Fault symptom | Checking method |
|---|---|---|
| Heating element evaporator | Ice on the evaporator, no cold | Resistance test |
| Defrost timer | Refrigerator does not exit defrost mode | Turn the slots screwdriver |
| Fan | Noise, lack of air circulation | Visual inspection and scrolling |
| Defrost sensor | Incorrect defrost cycle | Resistance measurement |
Particular attention should be paid to the defrost timer. In mechanical models Stinol it is a device with a clock mechanism. If you turn the timer slot clockwise until you hear a characteristic click, the refrigerator should go into cooling mode. If this does not happen, or if it “gets stuck” in defrost mode, the timer must be replaced.
⚠️ Attention: Do not leave the refrigerator in manual defrost mode for more than 30-40 minutes, this can lead to overheating of the heating element and a fire hazard.
Why ice forms in the system No Frost?
Ice is formed due to the fact that moisture from food and air enter the cold evaporator when the door is opened. In a working refrigerator, this ice is regularly melted by a heating element. If the cycle is broken, ice builds up and blocks the air supply channels.
Replacing the start relay and checking the compressor
The situation when the refrigerator hums for several seconds, then a click is heard and there is silence, indicates a problem with starting the engine. In 80% of cases it is to blame starting relay. This is a small box that fits onto the compressor rod. Inside there is a coil and contacts that burn or stick over time.
Replacing the relay is simple: remove the back cardboard or metal cover at the bottom of the refrigerator, disconnect the wires and remove the old relay. When purchasing a new part, it is important to take into account the power of the compressor and the type of refrigerant, since the relays for R134a and R600a may differ in design. For Danfoss compressors (often installed on Stinol), PTC type relays are often used, which are disposable and can be changed entirely.
If replacing the relay did not help, you need to check the compressor itself. The motor windings can be ringed through the contacts on the housing. The resistance between the working and starting windings, as well as between them and the housing (for breakdown) will make it clear whether the motor is alive. Interturn short circuit often leads to the compressor getting very hot and knocking out the machine in the panel. In this case, repairs are only possible in a specialized workshop for rewinding or replacing the motor.
☑️ Actions when replacing the relay
Eliminating problems with drainage and odor
The appearance of a puddle of water under the refrigerator or inside the bottom shelf of the refrigerator often indicates a clogged drainage hole. In models Stinol with a drip defrosting system, water should flow down the groove into the hole and then into the container above the compressor. Over time, mucus or a plug of debris forms in the tube, preventing drainage.
For cleaning, you can use a special cable brush or soft wire with a bent end. Carefully insert the tool into the hole and make rotational movements, trying to push the blockage deeper. Rinsing warm water using a syringe or bulb will help to completely clear the canal. Do not use sharp objects that can pierce the plastic of the case.
- 🧼 Rinse the drainage hole with warm water and baking soda to disinfect.
- 🌬️ Blow the tube with air (you can use a rubber bulb) to make sure information.
- 👃 If an unpleasant odor appears, treat the insides with a solution of vinegar or a special product for refrigerators.
Sometimes water appears due to the distortion of the refrigerator. Check the horizontal installation using a level. If the door is skewed, it may not fit tightly, allowing warm air to enter, leading to increased condensation. Adjusting the legs will help correct the situation.
⚠️ Attention: When cleaning the drainage, do not pour too much water at once, so as not to overfill the pan under the compressor if it is already full.
Prevention and extension of service life
So that repair of the Stinol refrigerator is not required as much as possible longer, you must follow the operating instructions. Regular defrosting (even for the No Frost system, complete defrosting is recommended once a year) helps maintain heat transfer efficiency. Ice accumulation causes the compressor to work longer and harder, reducing its service life.
It is important to keep the condenser - the black grill on the back wall - clean. Dust and pet hair act as a heat insulator, interfering with the cooling of the refrigerant. Vacuum the condenser need at least once every six months. Also check the rubber seals on the doors: if they are dirty or damaged, the cold will escape and the compressor will work without stopping.
Compliance with temperature conditions and chamber loading rules also affects durability. Do not put hot foods inside and do not overcrowd the refrigerator, blocking the ventilation holes. Stinol is a reliable technique, but it requires careful handling and timely maintenance.
Why does the Stinol refrigerator work without stopping?
Most often this indicates a freon leak, thermostat malfunction or loss door seal tightness. The compressor tries to gain temperature, but cannot due to the constant loss of cold.
Is it possible to replace the compressor on Stinol yourself?
Theoretically it is possible, but this requires special equipment: a pipe cutter, rolling and a freon filling station. Without a license and skills in soldering copper pipes, it is dangerous to undertake this operation.
How often do you need to defrost Stinol No Frost?
The No Frost system does not require regular defrosting to remove ice, but once every 6-12 months it is recommended to turn off the refrigerator for a day for hygienic washing and drying of hidden cavities.