According to the principle of operation, refrigerators are of several types:
-single-chamber- refrigerator with a built-in inner chamber, these include ammonia refrigerators
-two-chamber - they have a separate chamber for freezing products and a separate chamber for storing products
- No Frost refrigerators - they are characterized by the fact that they do not accumulate frost and cooling is done by forced ventilation with a fan.
-freezers- are only for storing deep-frozen products.
Two-chamber refrigerators can have one or two compressors.
Recently, two-chamber refrigerators have appeared with one compressor and a solenoid valve that regulates the supply of refrigerant once to the freezer, once to the refrigerator. When should you seek a refrigerator repair service - if you notice that the compressor is not working with the usual noise or does not turn on at all, the temperature in the refrigerator is higher than usual, the thermostat does not regulate the temperature, the compressor does not stop working.
Most often, there are two types of damage to refrigerators: mechanical or electrical.
Mechanical damage in refrigerators can be - a blocked compressor, a broken refrigeration system, a punctured evaporator, corroded subcooling, and others.
Electrical failures include - damage to the electrical installation, defective thermostat, defective compressor start relay, burnt out lamp, defective sensor, defective fan, timer, electronic board, and others.
The most common failure in refrigerators is an increase in temperature. The reasons for the increase in temperature are:
-broken hermetic system - lack of refrigerant
- clogged drainage channel - leads to freezing of the evaporator and disrupts air circulation (for No Frost refrigerators).
- change in the correct operation of the thermostat -reduced compressor flow rate (due to prolonged operation over the years). Repairing modern refrigerators is complex, even for people with good technical skills. Repair requires in-depth knowledge of the principle of operation of the refrigerator, many years of practical experience and specialized tools. When repairing a refrigeration system, vacuuming is mandatory. Vacuuming is one of the most important steps in repairing refrigerators, it ensures the correct operation of the refrigeration system. The presence of air is not allowed in the refrigeration system. Another important step is replacing the filter drier, it captures moisture and purifies the refrigeration system. Water is the number one enemy of the refrigerator, if even one drop of water gets into the refrigeration system, the refrigerator stops working. During the passage of the drop of water through the evaporator, it freezes and forms a plug through which the refrigerant cannot pass and leads to the cessation of the correct operation of the refrigerator. Very often I come across refrigerators repaired by colleagues without replacing the filter drier. This is unacceptable, the filter drier must be replaced when opening the refrigeration system of a refrigerator. Another common mistake is that the compressor service pipe is not closed hermetically but is left on a needle valve (similar to a car tire). The refrigeration system of domestic refrigerators must be 100 percent hermetic (every connection must be welded). From what I have listed here, my advice is that if you need to repair a refrigerator, look for a good professional refrigerator repair service.
