What should I do if the cold dish display cabinet is dry?

What you want to ask is "What if the cold dish display cabinet is not refrigerated?" It may be that the power plug and socket are in poor contact, so a new power plug and socket can be replaced.

If there is nothing wrong with the power supply, you can check whether the compressor is running continuously. If so, you can check whether the thermostat is too large, or whether the door of the box is not closed tightly, or whether there is a high-temperature heat source or direct sunlight nearby, or whether the food is placed too tightly, which affects the circulation of cold air, or whether the overheated food is put into the refrigerator.

If the compressor does not stop running, it is also possible that the thermostatic gear is too large and the food that is easy to freeze is close to the inner wall.