So simple and so complicated the question. The answer may lie either in mechanics or electronics. It is frustrating, but this problem also has a chance of being solved. It requires careful diagnosis, performed by a professional using special equipment and techniques.
Refrigerator doesn’t work
The most common reason for this problem is a problem with the water valve, which is clogged with minerals and cannot be opened and closed. In this case, it must be replaced, which is usually done by a professional.
Refrigerator ice dispenser or water dispenser not working
The cause may be an engine module - if it is worn out and needs to be replaced. Another common cause is a clogged water intake valve. It is also often due to problems with the ice-making mechanism. There are methods to test all these problems, so it is best to call a professional mechanic.
Refrigerator ice maker is not working
Normally, the temperature in the refrigerator must be between 35 and 45 degrees. If it is higher, it is very likely that the refrigerator is in need of repair. There are two main reasons for such a problem. The simpler reason is clogged condenser coils, which should be cleaned. The other reason that absolutely requires refrigerator repair is a broken defrost thermostat, condenser fan or evaporator fan. These parts need to be replaced by a technician.
Frost sometimes accumulates in old freezers. The reason may be a defective door seal, which allows warm and moist air into the freezer. The other popular culprit is a problem with the defrost sensor. It is better to entrust this work to a professional.