What are the ways to repair the refrigerator?

Common breakdowns of refrigerators and their maintenance methods;

First, the refrigerator does not cool mainly in the following aspects: 1, whether the compressor stops, if not, we can analyze it from the following aspects: the temperature in the refrigerator is on the high side, which has two situations: First, the refrigeration system leaks fluorine, that is, there is no refrigerant, although the refrigerator has been running, the temperature in the refrigerator cannot be reduced. After a long time, the food in the box will go bad and should be repaired in time. Generally speaking, as long as it is not a new refrigerator, this situation is very slow. In the early stage, half of the refrigerators had frost, the other half had no frost, and the frost edge was thick. After a long time, there will be no frost in the refrigerator. At this time, there may only be some water polo, and the temperature in the refrigerator is higher. This kind of refrigerator is generally difficult to repair, because the leak is difficult to find, so it can't be repaired for a long time. If leakage is found outside, oxygen welding can be used at this time. The second reason of high temperature is frosting of evaporator, which is mainly air-cooled refrigerator. This refrigerator has only one evaporator. When the frost on the evaporator can't melt, the air duct will be blocked, the cold energy can't go out, and the refrigerator can't cool. The reason for this situation is that there is something wrong with the defrosting system. It may be that the defrosting timer is faulty or the heating pipe has been burnt out. 2. The compressor cannot be started: 1). Whether the refrigerator has power or not, we can open the door of the freezer. If the light inside is on, it means that the refrigerator has electricity. If not, we can first check whether the main power supply has electricity, then check the fuse of the refrigerator (not all refrigerators have it), and finally check whether there is a problem with the contacts of the thermostat. 2) Whether the compressor is burnt out, you can check whether the motor coil is burnt out, and finally check the condition of the starter. Sometimes the overheat protector is working, and it takes some time to start the compressor after the temperature drops. 3) The thermostat cannot be reset, because the contacts are sintered together, so they cannot be separated.

Second, the refrigerator does not stop mainly in the following aspects: 1, the ambient temperature is too high: each refrigerator has its own climate type, such as SN, N, ST, T and so on. Usually, the maximum ambient temperature of SN and N refrigerators is 32 degrees. If it exceeds this temperature, it is easy for the refrigerator not to stop. This is mainly because the refrigeration capacity of the refrigerator is too small, or the power of the compressor is too small. Therefore, when purchasing refrigerators, we must pay attention to the nominal climate type of refrigerators. If the local temperature is high in summer, it is best to choose a refrigerator that can adapt to the high temperature environment. When the ambient temperature is high, the heat load of the refrigerator increases and the start-up time is long. At this time, the door should be opened as little as possible. 2. Low temperature adjustment: For a mechanical temperature refrigerator, because the temperature cannot be displayed, it is generally not adjusted after the thermostat is adjusted to a position, but the temperature inside the refrigerator is changing, so in summer, the refrigerator will not stop because the thermostat is adjusted to a low position. If you think the temperature in the refrigerator is too low, you can turn down the thermostat counterclockwise or turn down the number. For computer refrigerators, there are great advantages in this respect. 3. Frosting on the wall of the cold storage room: For the mechanical temperature-controlled refrigerator, especially in the high temperature environment, frost can be seen on the wall of the cold storage room, and the frost layer is thick, which makes the refrigerator unable to stop. The main reasons for this situation are that the thermostat temperature is too low, or the food in the box is stored in the wrong place, the refrigerator is opened too many times, and the refrigerator door seal is not well insulated. The solution is to close the refrigerator first, defrost the refrigerator wall, adjust the position of the thermostat, and check the door seal before restarting. If the refrigerator is normal, this phenomenon will be dealt with. If there is something wrong with the refrigerator itself, it should be handled by the manufacturer. 4. refrigerator thermostat failure: the thermostat failure of the refrigerator itself will also lead to the refrigerator not stopping, but this kind of non-stop will exist not only in high temperature environment, but also in all environmental temperatures, only in high temperature environment. The main reason is that the mechanical thermostat leaks fluorine, or the temperature sensor can't feel the temperature, and the control circuit board of the computer refrigerator is faulty. 5. Refrigerator leaks refrigerant: There is no early performance of refrigerator not cooling. After a long time, the temperature of refrigerator will rise and slowly start not cooling, but the compressor of refrigerator is still working. A good method can judge the quality of a refrigerator. If the compressor is working, but there is no heating on both sides of the refrigerator (as most refrigerators do now), it can be preliminarily determined.

3. Cause analysis of the vibration sound (1) of the condenser: In the process of using the refrigerator, sometimes the condenser will be heard to vibrate or crack, which is more common in louver condensers. Therefore, this kind of condenser squeezes the cooling tube on the louver flat radiator to form a whole, but in the production process, or for other reasons, the combination between the cooling tube and the radiator is often poor, resulting in looseness. Therefore, during the operation of the compressor, the temperature difference between the inside and outside of the condenser tube and the thermal expansion coefficient of the cooling tube and the heat sink are different, which leads to the looseness of the two tubes and the cracking sound. Although this noise does not affect the use of the refrigerator for the time being, it will be annoying to ring for a long time, and it will damage the cooling pipe and cause refrigerant leakage. (2) Troubleshooting: Stop the operation of the compressor, then drop 502 glue on the loose parts of the cooling pipe and radiator, dry and cure for one day, and then start the compressor, so there will be no noise.

Fourth, the refrigerator condenser is hot and cold: the condenser of the refrigerator is used to dissipate heat and release the heat generated during refrigeration of the refrigerator to the surrounding environment. At present, there are two main design methods. One is hanging behind the refrigerator, which is common in the early days, and the other is hidden in the side panels of the refrigerator. This is a relatively new way, and its main purpose is to look beautiful and reduce the condensed water on the side panels. When the refrigerator cools, the condenser begins to heat up. When the refrigerator stops, the refrigeration stops, and the temperature of the condenser drops slowly until the temperature is 2~3 degrees lower than the ambient temperature. In summer, you can feel fever on both sides, but the temperature on one side is always higher. There may be no fever on one side in other seasons. This is because the heat load is small and the area of the condenser is relatively large, so the temperature on the other side is already equivalent to the ambient temperature. The quickest way to test the quality of the refrigerator is to feel the heat of the condenser shortly after the refrigerator is opened. Otherwise, the refrigerator may not be able to cool. Compared with the ambient temperature, the maximum temperature of the refrigerator condenser is generally about 10 degrees higher. Because the condenser sticks the pipe to the side plate, the temperature of the side plate is different at different points.