1. Temperature setting is too low: If the temperature of the refrigerating room is set too low, the water in the refrigerating room will freeze and form an ice layer.

2. Poor sealing of refrigerator door: If the refrigerator door is poorly sealed, it will cause outside air to enter the refrigerator and freeze the moisture in the refrigerator.

3. The drain hole of the refrigerator is blocked: If the drain hole of the refrigerator is blocked, the water in the refrigerator will not be discharged, and an ice layer will be formed.

4. Refrigerator fan failure: If the refrigerator fan fails, it will lead to poor air circulation in the refrigerator and freeze the water in the refrigerator.

Solution:

1. Adjust the temperature setting: set the temperature of the refrigerating room in a suitable range.

2. Replace the door sealing strip: If the refrigerator door is poorly sealed, the door sealing strip needs to be replaced.

3. Clean the drain hole: regularly clean the drain hole of the refrigerator to keep it unblocked.

4. Replace the fan: If the refrigerator fan fails, it needs to be replaced.