High temperature of freezer

There are two cases of high temperature in the freezer: first, the refrigerant leaks fluorine without refrigerant. The freezer has been working all the time, but the temperature in the freezer cannot be lowered. For too long, the food in the cabinet is seriously lost. Please repair it in real time. As usual, it is not only a new commercial freezer, but also usually gives you a feeling of being slow in a half-frosted cold room. The other half is frost-free and thicker on the Frost side. The commercial freezer did not Frost for a long time. At this time, there may be some water polo, and the temperature in the cabinet is very high.
such freezers are usually difficult to repair. It is difficult to find long-term leaks after maintenance, because it is difficult to find leaks. The second reason for the high temperature is the frosting of the evaporator. This situation is mainly an air-cooled refrigerator. This type of refrigerator needs an evaporator. If the frost of the evaporator is not lost, the air passage will be blocked. The cold will not be emitted and the commercial freezer cannot be cooled. This situation may be due to a problem with the defrosting system, or due to a problem with the defrosting timer or damage to the heating pipe. 1. The compressor cannot start
if there is no power supply in the freezer and the internal indicator light may turn on, the door of the refrigerator can be closed. If the freezer declares that there is electricity, if the light is not on, please check whether the main power supply is on, and then make sure that the fuse of the freezer is not all freezers. Is there a problem with the contact of the thermostat?
2. The compressor may burn out, the motor coil burns out, and the starter can be checked. When the overheat protection cover is running, it must wait for a period of time before the compressor temperature starts to drop.
3. The problem occurs because the thermostat cannot be reset because the contacts are sintered from each other and cannot be separated.