Failure compressor is perhaps the most serious and expensive breakdown that the owner of household appliances may encounter. If you hear that the engine is humming, but does not start, or the unit is silent, although the light is on, and the food begins to deteriorate, most likely the resource of the main unit has been exhausted. Replacing a compressor in a refrigerator Samsung is a technically complex process that requires not only physical strength, but also special knowledge, as well as the availability of professional tools.
Many users wonder whether it is worth undertaking such repairs themselves. On the one hand, calling a specialist with official status can cost a significant part of the price of a new device. On the other hand, replacing it yourself allows you to save on work, but requires high concentration and compliance with safety precautions. It is important to understand that we are not just talking about mechanical replacement of a part, but about working with refrigerant and a sealed circuit.
In this article we will analyze in detail the entire process: from diagnostics to starting the system. You will learn what tools you will need, how to properly prepare your workplace, and what to pay special attention to when soldering pipes. Remember that any mistake can lead to the final failure of the equipment, so carefully study each step before starting work.
Fault diagnosis and preparation for repair
Before disassembling the refrigerator, you need to make sure that the problem lies in the motor. Often the symptoms of a faulty compressor are confused with a faulty start relay or thermostat. If you hear a click when you turn it on, followed by a buzzing sound that lasts 5-10 seconds, followed by another click and silence, this is a classic sign that engine tries to start but can't. In such cases, sometimes the culprit is a stuck start relay, which costs pennies, while a new compressor is expensive.
For accurate diagnostics, professionals use a multimeter to check the windings for an open or short circuit. The resistance between the contacts must be within certain limits, usually from 20 to 40 Ohms, depending on the model. If the device shows infinity or zero, it means the winding has burned out. It is also worth checking the resistance between the housing and the contacts - if there is resistance, it means that a breakdown has occurred on the housing, and the operation of such a unit is life-threatening.
Preparation for repairs begins with completely disconnecting the refrigerator from the power supply. You will need to gain access to the rear wall where the engine compartment is located. To work, you will need wrenches (usually 8, 10 and 12 mm), pliers, side cutters and, most importantly, a torch for soldering copper tubes. Without a gas torch and solder, it is impossible to make a high-quality replacement, since the connection must be absolutely sealed.
⚠️ Attention: Before starting any work, make sure that the refrigerator is completely defrosted and dry. Moisture in the engine compartment can cause a short circuit or injury when operating power tools.
Pay special attention to the model of your refrigerator. The Samsung RB30 or RS60 lines can use compressors from different manufacturers, for example Secop (formerly Danfoss) or Samsung Digital Inverter. Digital inverter compressor is controlled by complex electronics, and replacing it often requires reflashing the control board, which is almost impossible to do at home. If you have exactly this model, replacing the motor yourself is not recommended.
Necessary tools and consumables
The success of the operation directly depends on the quality of preparation. You will need not only a new compressor, but also a number of related materials. Copper tubes for connection must be clean, free of oxides, preferably with a filter drier already installed. The filter-drier is a mandatory element that is changed every time the circuit is opened, since the old one is already saturated with moisture and will not be able to protect the system from the formation of ice plugs.
For soldering you will need hard solder (often containing silver) and flux. The use of soft tin solder for refrigeration systems is not recommended as it may not withstand pressure and vibration. A cylinder with nitrogen is also needed to purge the system, although in garage conditions they often make do with purging with the refrigerant itself, which is less effective, but acceptable if safety measures are strictly observed.
- 🔧 Wrenches and screwdrivers (phillips and flat) for dismantling the casings.
- 🔥 Gas burner with a cylinder (propane-butane or oxygen-propane for better temperature).
- 🧪 Solder (copper-phosphorus or silver) and flux for soldering.
- 💨 Refrigerant cylinder (freon R600a or R134a depending on the model).
- 🛡️ Safety glasses and gloves for safety.
It is important to choose the right type of refrigerant. Modern refrigerators Samsung most often use isobutane (R600a), which is an explosive gas. Working with it requires special care: there should be no open fire in the room (except for a burner during soldering) and sparking devices. If your model uses R134a, it is less dangerous, but also requires careful handling.
Removing the old compressor
The process of removing the old unit begins with access to the engine compartment. Remove the back cover of the refrigerator by unscrewing the fixing screws. You will have a view of the compressor, condenser grille and tube system. The first step is to bleed off any remaining refrigerant. To do this, cut through the thickest filling tube (usually it is sealed). The gas will come out with a characteristic whistle - make sure that the room is well ventilated.
After bleeding the gas, you can begin to disconnect the electrical wires. Take a photo of the connection diagram or mark the wires with a marker so as not to mix them up when installing a new motor. Typically these are three contacts for the start relay and ground. Carefully remove the start relay and protective cover; they may be needed for the new compressor if it was supplied without them.
Now comes the turn of soldering. The joints of the copper tubes with the compressor pipes are heated with a burner. When the solder melts, the tubes are carefully moved to the side. Do not use excessive force to avoid damaging the capacitor or other system components. If the tubes are stuck, the heating needs to be increased, but not overheat the compressor housing itself.
| Refrigerant type | Color marking | Danger | Pressure in the system |
|---|---|---|---|
| R600a (Isobutane) | Green | High (explosive) | Low |
| R134a | Blue | Medium | Medium |
| R12 (old models) | White | Low | High |
After disconnecting the tubes, the compressor is attached on four legs to the frame refrigerator. Unscrew the mounting bolts or nuts. Be careful: the weight of the unit can reach 10-12 kg, and it can slip out of your hands. It is better to carry out this operation with an assistant. Dispose of the old compressor according to the rules of your region, as oil may remain inside, polluting the environment.
☑️ Preparation for soldering
Installing and soldering a new compressor
Installation of a new motor begins with preparing the seat. Check if the mounting holes match. If the new compressor Samsung comes without a starting relay, carefully move it from the old unit, first checking the integrity of the contacts. Mount the motor to the frame and bolt it securely, using new rubber damper bushings if included to reduce vibration.
The most important stage is soldering the tubes. Insert copper tubes into the compressor pipes (suction and discharge) to a depth of 15-20 mm. Heat the joint evenly with a torch, moving the flame around the tube. When the copper heats up to a dark cherry color, bring a rod of solder. It should melt from the heat of the metal, and not from the flame of the burner, flowing into the gap under the action of the capillary effect.
It is strictly forbidden to allow flux to get inside the tubes, as this will lead to clogging of the capillary and failure of the system. After soldering, allow the joint to cool naturally without blowing on it or pouring water on it to avoid microcracks. Check the seam visually: it should be smooth, without holes or sagging.
⚠️ Attention: When soldering, always keep a fire extinguisher at hand. Flux vapor and possible oil residue in the tubes may ignite. Work in a well-ventilated area.
After soldering, the filter drier must be replaced. It is installed at the outlet of the condenser in front of the capillary tube. Soldering the filter requires special speed: it must not be overheated, otherwise the activated carbon inside will lose its properties. It is enough to warm up the connection for 5-7 seconds.
Evacuating and charging with refrigerant
Simply replacing the compressor is not enough - there should be no air or moisture left in the system. To do this, the circuit is evacuated. A vacuum pump is connected to the filling fitting and the air is pumped out for 15-20 minutes. This allows you to remove water vapor, which, when frozen, can clog the capillary. If there is no pump, some craftsmen use the method of purging with refrigerant, but this is less reliable and leads to excessive gas consumption.
After evacuation, close the pump valve and allow the system to stand under vacuum for 10 minutes. If the pressure does not increase, then the system is sealed. Now you can start refueling. The freon cylinder is weighed on an electronic scale. The amount of refrigerant is indicated on a sticker inside the refrigerator compartment or on the back wall (usually from 50 to 140 grams). The deviation should not exceed ±5 grams.
Refilling is carried out only with the compressor running. Open the valve on the cylinder and slowly release gas into the system. Control the weight of the cylinder. When the required amount has been collected, clamp the filling tube, seal it and check the operation of the system. The pressure on the pressure gauge must correspond to the norm for a given type of refrigerant and ambient temperature.
Why is vacuum important?
Evacuation removes not only air, but also moisture. Water in the system is fatal to the refrigerator: freezing in the capillary, it forms an ice plug that blocks the circulation of freon, and in combination with oil and freon can form acid that destroys the motor windings from the inside.
Operability check and testing
After refueling, you must start the refrigerator and let it work at least 30-40 minutes. At this time, you cannot close the doors tightly so that the compressor does not run idle without load, but you should not keep them open for a long time. Check the heating of the condenser grille from behind: it should warm up evenly, approximately 2/3 of its height. If only the top or bottom heats up, there may be air in the system or undercharging.
Listen to the operation of the new compressor. It should hum smoothly, without knocking, clanging or vibration. If you hear strange sounds, the tubes may be touching the housing or each other - in this case, work should be stopped and the cause of the noise eliminated. Also check the freezer: after an hour of operation, uniform frost should appear on the evaporator.
- ✅ Check the tightness of all seams with soap solution (there should be no bubbles).
- ✅ Make sure that the temperature in the chambers begins to decrease.
- ✅ Check the current consumption with an ammeter (must be within the limits of the passport).
If all parameters are normal, you can replace the back cover. However, a full check of the quality of freezing products should be carried out during the first day of operation. Do not load the refrigerator with food right away; let it enter empty mode.
Common mistakes and precautions
Beginners often make the mistake of believing that the more freon, the better the cold. This is a dangerous misconception. Refilling leads to liquid freon entering the compressor, causing a hydraulic shock that instantly breaks the valves or motor shaft. Always strictly follow the dosage specified by the manufacturer.
Another common problem is poor soldering. The microscopic hole will vent gas for weeks, and after a month the refrigerator will stop freezing again. The quality of the seam is 90% of the success of the repair. If you are not confident in your copper soldering skills, it is better to practice on pipe scraps before tampering with expensive equipment.
⚠️ Attention: Specifications and refrigerant requirements may vary depending on the specific model and year of manufacture. Always check the technical documentation on the sticker of your Samsung refrigerator before purchasing consumables.
Do not forget about electrical safety. The compressor is a powerful consumer, and if the relay is connected incorrectly or the insulation is damaged, a short circuit may occur. All electrical connections must be securely fixed and insulated.
How much does it cost to replace a compressor at a service center compared to self-repair?
In a service center, the cost consists of the price of the spare part (about 6-10 thousand rubles for conventional ones, up to 20 thousand for inverter ones) and labor (from 5 to 10 thousand rubles). On your own, you spend only on the compressor, freon and consumables, saving a significant amount, but you take on all the risks.
Is it possible to use a compressor from another brand, for example, Danfoss, in a Samsung refrigerator?
Yes, you can, if the overall dimensions, power (LBP or HBP class) and the type of refrigerant are the same. However, the fastenings may differ, and you will have to make an adapter frame or drill new holes, which requires skills.
Why does the refrigerator not freeze after replacing the compressor?
There may be several reasons: freon leakage due to poor soldering, blockage of the capillary with moisture or dirt (if the filter has not been changed or vacuumed), or a malfunction of the new one compressor (rare, but there are factory defects).
Is it necessary to flush the system when replacing a compressor?
Nitrogen flushing is required if the old compressor burned out and released black oil into the system. If it just stops pumping without burning, it is enough to replace the filter-drier and blow out the system.