1. Lack of refrigerant. If the air conditioning refrigerant is insufficient, the cooling effect will be poor. The principle of air conditioning refrigeration is that the refrigerant evaporates to absorb the heat in the air, so that the blower blows out cold air. Therefore, when the air conditioning refrigeration is not cool or the wind blown out is hot air, you should first check the pressure of the refrigerant, if the high pressure and low pressure are lower than the standard index, then the refrigerant may be missing.
2. The air conditioner compressor is faulty. The air conditioning compressor is to pressurize the refrigerant, so that the refrigerant liquefied, and finally vaporized in the evaporation box to absorb heat. If the air conditioning compressor fails, the degree of liquefaction of the refrigerator is low, and it cannot be fully vaporized in the evaporation box, and it cannot provide effective heat absorption. 3
Hair dryer will not blow out cold air, at most is room temperature wind. In the case of blowing normal temperature air after using hot air before the hair dryer, the electric heating wire temperature in the hair dryer has not been reduced to normal temperature, and the wind temperature blown out will be slightly higher than normal temperature.
In the case of abnormal electric heating electrical components of the hair dryer, it is also possible that the electric heating wire is still energized at room temperature. In this case, it is necessary to check and maintain in time to avoid accidental danger.