A sudden stop of the refrigerator Stinol or the appearance of loud clicks that interrupt the hum of the motor often frightens owners, but does not always require calling an expensive technician. In most cases, especially if the compressor tries to start and immediately stalls, the problem lies in the failure of the start relay. This small but critical element is responsible for supplying voltage to the starting winding of the engine at the moment of start. Without it, the rotor cannot gain the necessary speed, and thermal protection is triggered.
Replacing this component on your own is a task that is accessible even to beginners in the world of household appliances, if you act carefully and follow safety precautions. You do not need complex tools or in-depth knowledge of electrical engineering, just a basic understanding of the device and a basic DIY kit. The main thing is to accurately determine the model of your device, since starting relay for different modifications Stinol-101, Stinol-103 or newer series may differ in design and electrical parameters.
In this article we will look in detail at how to diagnose a breakdown, how to choose the right analogue and, most importantly, how to safely make a replacement. We will look at the nuances of working with a thermal relay, the features of connecting the terminals and typical mistakes that are made during repairs. Properly performed repairs will extend the life of your refrigerator for many years and save a significant amount of the family budget.
Signs of a faulty start-up protection relay
The first and most obvious symptom is the characteristic behavior of the compressor. The refrigerator turns on, there is a loud click, the motor hums for one or two seconds, then another click follows, and there is silence. After some time, the cycle repeats. This is a classic picture of how it works and turns off thermal protection, preventing the engine from burning out when trying to start without a starting impulse. If you hear exactly this sequence of sounds, the probability of failure of the starting device is more than 80%.
Another sign is a complete lack of starting when the lighting inside the chamber is on. The light is on, which indicates the presence of voltage in the network, but the compressor is silent. Sometimes you can only hear a quiet hum or crackling sound. In rare cases, a faulty relay may “stick”, and then the compressor will work continuously without turning off, which leads to severe overcooling of food or the formation of a “fur coat” in the freezer. However, most often we are faced with the impossibility of starting.
Visual inspection can also provide important clues. If you remove the back cover and see the relay, there may be traces of burning, melted plastic, or black deposits on the contacts. Sometimes inside the case you can hear the burnt out coil dangling if you shake it (after unplugging it from the mains!). The smell of burnt insulation in the compressor area is also a sure sign that the electrical circuit is broken and intervention is required.
⚠️ Attention: If after the click you smell a strong burning smell or see sparking, immediately disconnect the refrigerator from the power supply. Further operation in this condition may lead to a fire in the wiring or complete combustion of the compressor.
It is also worth considering that similar symptoms may appear if the compressor itself malfunctions (turn-to-turn short circuit) or the windings are broken. However, before sinning on an expensive motor, they always start checking with the cheapest and most often broken element - the starting relay. Replacing it costs a penny compared to replacing the unit.
Diagnostics and selection of a new relay
Before going to the store or ordering a part online, you need to accurately identify the failed component. Starting relays for refrigerators Stinol (as well as Indesit and Ariston, since this is one group) come in different types: for single-compressor and double-compressor models, with and without a shutdown timer, with different starting current parameters. An error in selection will result in the new element burning out in a few minutes or simply not starting the engine.
The most reliable way is to remove the old relay and study the markings. Usually the manufacturer's code is printed on the case, for example R600, PTC, 13.60335.00 or K59-L1124. Also important parameters are the operating current (for example, 1/4 HP or 1/5 HP) and installation orientation (the compressor can be vertical or horizontal, and the relays must match this). Often there is an arrow on the case indicating the correct installation position.
When purchasing, pay attention to the number of contacts. A standard relay has two or three terminals for connecting to the compressor and two for connecting to the network (phase and zero). There are universal models that are suitable for a wide range of refrigerators, but it is better to look for an original or a high-quality analogue, specially designed for appliances Stinol. Cheap Chinese copies without markings often do not have proper thermal protection, which is dangerous for the engine.
If you are not sure about the choice, take a photo of the refrigerator nameplate and the relay itself to consult with the seller. You can also use the catalog numbers of spare parts, which can be easily found on the Internet according to the model of your refrigerator. Remember that starting current must strictly correspond to the power of your compressor, otherwise the starting mechanism will not work correctly.
Necessary tools and safety measures
Replacing the relay does not require complex professional equipment. The entire process can be completed using a minimal set of tools that any man can find in his home. The main thing is to ensure the safety of the work, since we are dealing with electric current and fragile elements of the cooling system.
Here is a list of what you will need for a successful repair:
- 🔧 Screwdriver (Phillips or flat) for removing the protective cover of the compressor.
- 🔌 Pliers or pliers for careful removal of terminals.
- ✂️ Knife or side cutters if you need to strip the wires (although this is usually not necessary).
- 📸 Smartphone to take a photo of the connection diagram before disassembly.
- 🧤 Dielectric gloves (preferably, but not necessary for de-energized appliance).
The most important rule: before starting any work, the refrigerator must be completely disconnected from the power supply. Unplug the plug from the socket. Do not rely only on the switch on the case or thermostat - complete isolation from the network is required. Also, allow the compressor to cool down if it has just been running to avoid getting burned on the metal tubes.
You will be working in a confined space at the back of the refrigerator, so ensure you have good access. Move the unit away from the wall, but do it carefully so as not to damage the floor or plastic elements. If the floor is slippery, place cardboard or a rag under the feet. Also make sure that there is good lighting in the work area, as connectors and wires may be hidden in the shadows.
⚠️ Attention: Never carry out repair work while the refrigerator plug is in the socket, even if you are simply removing the cover. Residual voltage or accidental contact with live contacts can cause serious injury.
Step-by-step instructions for replacing a relay
The replacement process is quite simple and linear if you proceed sequentially. Take your time and watch every movement carefully. The main difficulty lies not in the complexity of the operation, but in the accuracy of the execution, since plastic parts become fragile over time.
Follow this algorithm of actions:
- Unplug the refrigerator and move it away from the wall to access the back panel.
- Find the compressor (the black barrel at the bottom) and remove the protective plastic or metal cover by unscrewing the screws or unlatching the latches.
- Visually inspect the relay attached to the end of the compressor. Take a photograph of its position and the connection of the wires.
- Carefully remove the relay from the compressor contacts. It may be a tight fit, so wiggle it slightly from side to side, but do not yank suddenly.
- Disconnect the wires going to the relay. They can be slipped onto terminals or inserted into a connector. Remember or mark which wire was connected where.
- Install the new relay in place of the old one, observing the orientation (top-bottom, often indicated by an arrow
UPorTOP). - Connect the wires in the same order as they were connected previously.
- Secure the casing and turn on the refrigerator to the network to check.
☑️ Checklist before turning on
When installing a new relay, it is important to hear a characteristic click when it snaps into place. The contacts should connect tightly. If the relay has a thermal protection (bimetallic strip), make sure that it is also installed correctly and is not distorted. In some models, the relay is fixed with an additional metal clamp or bracket - do not forget to return them to their place.
After assembly, turn on the device. The compressor should start with a characteristic hum. If the start-up was successful, after 5-10 minutes you should feel that the compressor tubes begin to heat up (outlet) and the freezer compartment begins to feel cold. If the refrigerator is working, you can consider the repair complete.
Compatibility table and relay parameters
To make it easier for you to navigate the markings, we have prepared a table with the main relay parameters that are often found in refrigerators Stinol. Please note that the appearance and exact code may vary depending on the year of manufacture and the compressor manufacturer (Danfoss, Embraco, Atlant, etc.).
| Relay type | Marking (example) | Compressor power | Features |
|---|---|---|---|
| PTC R600 | 13.60335.00 | 1/4 - 1/3 HP | The most common, with a posistor |
| Thermal relay | TA-65 | 1/5 HP | Often paired with a starting one |
| Combined | RT (series) | 1/4 HP | Start and protection in one case |
| For No Frost | K59-L1124 | 1/3 HP | Enhanced moisture protection |
The “Power” column shows values in horsepower (HP). 1/4 HP approximately corresponds to 130-160 Watts, which is standard for most mid-sized household refrigerators. Using a relay with a lower rating will lead to its rapid burnout, and with a larger one - to incorrect startup.
If you do not find an exact match by code, look for an analogue with the same electrical characteristics and seat geometry. It is important that the holes for the compressor pins match in diameter and distance. Sometimes you have to slightly bend the contacts of the new relay so that they fit tightly into the compressor connector, but this must be done very carefully so as not to break the ceramic base.
Frequent errors and troubleshooting
Even with a simple replacement operation, mistakes can be made that will negate all efforts. One of the most common is incorrect relay orientation. Many models are sensitive to position in space. If you turn the relay upside down, the mechanism may not work or the thermal release may not behave correctly. Always look for the marking TOP or arrow.
The second mistake is poor contact. If you do not fully seat the terminals on the relay or compressor contacts, sparking and heating will occur at the connection point. This will lead to oxidation of the contacts and repeated failure after a short time. All connections must be tight and the wires must not dangle. If the terminal is loose, you can carefully tighten it with pliers.
The third mistake is ignoring the condition of the compressor. If after replacing the relay the situation does not change (it clicks and does not start), the problem may be deeper. Perhaps the compressor itself has jammed or the winding has burned out. In this case, simply replacing the relay will not help; more complex repairs or replacement of the unit will be required. It is also worth checking the thermostat - if it does not close the circuit, the relay simply will not receive a signal to start.
Do not forget about thermal relay. In some designs it is a separate element, in others it is built into the launcher body. If you are replacing only the starting part, make sure that the thermal protection is in good working order. You can check it with a multimeter: in a cold state it should “ring” (show zero ohms), and when heated (you can gently warm it up with a hairdryer), open the circuit.
Checking the result and further operation
After successfully starting the refrigerator, no hurry up to immediately load it with products. Let it run idle for at least 2-3 hours. This will ensure the stability of the compressor and the correct on-off cycle. Normally, the refrigerator should reach temperature and turn off. If it works non-stop, perhaps the problem is not only in the relay, but also in a freon leak or a malfunction of the thermostat.
Listen to the operation of the motor. It should hum smoothly, without vibrations or extraneous knocks. A slight crackling sound in the first few minutes after turning it on or off is normal (plastic and metal expand and contract), but constant noise is a sign of a problem. Also check the heating of the body of the new relay: it may be warm, but it should not be so hot that it is impossible to touch it with your hand.
Regularly, once every six months, look at the back of the refrigerator and check the cleanliness of the condenser (the grille at the back). Dust and animal hair impair heat transfer, causing the compressor to work longer and harder, which shortens the life of both the motor and the start relay. Cleanliness and ventilation are the key to the long life of your equipment.
Is it possible to repair an old relay rather than changing it?
Theoretically, if the problem is sticking contacts, they can be cleaned. However, starting relays Stinol are often filled with a compound or have a non-separable housing with a posistor. An attempt at repair in 90% of cases leads to a temporary effect and repeated breakdown after a week. Considering the low cost of a new part, repairing an old relay is not economically feasible and is a fire hazard.
Why does a new relay burn out after a short time?
This may indicate problems with the compressor itself (hard start, interturn short circuit), voltage surges in the network, or incorrect selection of the relay rating. Also a common cause is poor contact in the power circuit, causing heating. If the second relay burns out quickly, diagnostics of the compressor by a technician is necessary.
What is the difference between the relay for Stinol 101 and 103?
Models Stinol-101 and 103 can be equipped with different compressors. The 101 model often featured simpler relays, while the 103 (especially with No Frost) used more powerful options with additional protection. Visually they may be similar, but differ in operating current. Always check the markings on the case.
It buzzes, but does not start - is it the right relay?
In 8 out of 10 cases - yes. But this may also be a sign of jamming of the compressor piston group or breakage of the starting winding. If after replacing the relay and checking the voltage the picture does not change, most likely the compressor will need to be replaced.
How to understand that a posistor has burned out?
Without disassembly - by lack of startup. When tested with a multimeter, a serviceable posistor in a cold state has a small resistance (tens of ohms). If the resistance is infinitely high or equal to zero (short circuit), the element is faulty. Visually, a burnt posistor may have cracks or blackening.