The air conditioner turns on cooling at 16 degrees. Why can it only drop by 4 to 5 degrees regardless of the weather and indoor temperature? We can't go any further.

The air conditioning system is abnormal or the number of air conditioners does not match the size of the room.

The air inlet temperature and air outlet temperature of indoor unit are measured by ordinary thermometer. If the temperature difference between the inlet and outlet air is above 8 ~ 10 degrees, the refrigeration effect of the air conditioner itself is no problem. If the temperature difference between inlet and outlet air is less than 8 degrees, the refrigerant in the air conditioning system pipeline may leak to some extent; If the temperature difference between the inlet and outlet air is too large, the return air filter of the indoor unit of the air conditioner should be cleaned immediately.

Household air conditioners are generally selected according to the cooling capacity of air conditioners 160 ~ 220 W/m2. When the number of air conditioners is small, the room area is large or the thermal insulation is poor, the refrigeration effect of air conditioners will become worse.

During the daily use of air conditioners, the return air filter of indoor units of air conditioners should be cleaned regularly to ensure smooth ventilation around outdoor units, and doors and windows should be closed, and a basin of clean water should be put in a suitable position indoors to help the air conditioners cool down, which is beneficial to the air conditioners to lower the indoor temperature better.