1, maybe there is something wrong with the thermostat. 2. It may be the problem of ice jam. It may be that there are too many things in the refrigerator, which causes the illusion that the refrigerator does not cool. 4. It may be that the refrigerator leaks or the refrigerant is insufficient, which leads to poor refrigeration.

Suggested solution:

1. First, determine whether the compressor is working. If the compressor has been working, it is blocked by ice. If the compressor stops, there is something wrong with the thermostat. You should call a refrigerator repairman to repair it. But instead of vacuumizing, nitrogen is used to blow dry the pipeline or replace the refrigerant.

2. When there is a trace of water in the pipeline, when the refrigerator starts to cool, it will freeze up in the pipeline with the decrease of temperature. In this case, you just need to clean up the things in the refrigerator, then turn off the power, and when the ice melts naturally, the refrigerator can be cooled again.

3, try to slim down the refrigerator, maybe it can work normally, this situation is generally drawn because you don't know how to use the refrigerator.

4. When the freezer is not cooled, we can check whether the refrigerant in the refrigerator is insufficient. If the refrigerator is not cooled due to refrigerant leakage, we need to find out where the refrigerant leakage point is, repair and weld the leakage point, and then add an appropriate amount of refrigerant to the refrigerator.