It may be that freon is not enough, and adding freon can solve it; It is also possible that the power supply voltage is unstable, and a home voltage regulator can be installed; It may also be that the power of the air conditioner is not enough, and it can be solved by replacing the high-power air conditioner; It may also be that the external environment temperature is too high, which will change the installation environment of the outdoor unit; It may also be that the air conditioner has not been cleaned for a long time. The air conditioner must be maintained and cleaned regularly. 1, Freon deficiency is a normal phenomenon, especially after the air conditioner is used for 3~4 years, the refrigeration effect of the air conditioner will be obviously reduced. After all, air conditioners will volatilize during use. At this time, it is necessary to find professional maintenance personnel to add Freon in time to solve the problem that the air conditioner does not cool. 2, the power supply voltage is not enough, often can not reach the normal voltage, especially in the peak period of electricity consumption, air conditioning will not cool, so it is necessary to maintain the normal power supply voltage, which can solve the problem that air conditioning does not cool. 3. Air conditioning power is insufficient, which is also one of the common reasons for not cooling. For example, in a large room with low-power air conditioning pipes, because the room is relatively closed or there is a heating source in the room, the power space of the air conditioner can match the required cooling capacity, changing the conditions of the use environment and increasing the airtightness of the use environment. 4. If the outdoor temperature is too high, it is necessary to change the installation environment of the outdoor unit at this time, which can solve the problem that the air conditioner does not cool. Air conditioners need to be cleaned and maintained regularly when in use, so it is very important to maintain good heat dissipation effect.