New energy vehicle air conditioning does not cool down due to insufficient or insufficient refrigerant.

Insufficient or insufficient refrigerant, or micro-leakage of refrigerant, or excessive refrigerant will cause the air conditioning to not cool down. Because there is a requirement for the proportion of refrigerant in the air conditioning system.

It can be observed from the sight glass above the desiccant tank that when the air conditioning is operating normally, if there are continuous slow bubbles in the sight glass, it indicates that the refrigerant is insufficient, and adding an appropriate amount of refrigerant is sufficient.