1. Check if the circuit of the cooling fan water pump is damaged. If it is damaged, replace it with a new water pump and connect it to the power source to ensure that the water pump is powered on;

2. Check if there is any dirt at the water inlet of the water pump, and promptly organize or replace the water in the sink if there is any dirt;

3. Check the water pump rotor to ensure that it is not damaged or blocked.

4. Please disconnect the power supply before checking the air cooler;

5. The cold air fan and water pump cannot dry burn when there is no water;

6. Do not directly use the power cord to pick up the water pump;

7. Do not operate the cooling fan and water pump in hot water;

8. The cold air fan and water pump are working in clean water to see if their lift is normal