The reasons why the automobile air conditioner does not heat are: the air conditioner filter element is dirty and blocked, the cable of the control damper of the cold and warm air heater box falls off, the heater impeller is damaged, and the damper falls off.
1. Lack of refrigerant. Refrigerant is the refrigeration medium of air conditioner, which is usually added once every 2~3 years. Air conditioning is a sealed device, and air conditioning refrigeration is a physical reaction, but it still needs to consume a small amount of refrigerant, and at the same time, because there is a slight leakage in the air conditioning pipeline or condenser, it will accelerate the consumption of refrigerant.
2. The air conditioner damper is damaged. Air conditioning damper belongs to the main switch of air conditioning tuyere and is used to control the output of cold and hot air. If it is broken, it means that the switch is broken. Even if the air conditioner can cool the air, it can only come out of the gap.
The condenser is too dirty. The function of condenser is mainly to dissipate heat. Catkin and catkin sticking to the condenser in spring will cause the engine temperature to be too high or the air conditioner will not be smooth, which will not only affect the refrigeration of the air conditioner, but also increase fuel consumption.
4. The air conditioner compressor, throttle valve or expansion valve is damaged. At present, the compressors of air conditioning systems are equipped with clutches, and the compressors only work when the clutches are engaged. If the compressor is damaged and cannot be switched to the engaged state, the air conditioner will not be able to cool.
5. There is water in the pipeline. There is a drying tank in the refrigeration system, which is used to absorb the moisture in the refrigerant and prevent the cooling capacity from decreasing due to too much moisture in the refrigerant. When the desiccant in the drying tank is saturated, water can no longer be filtered out. When the refrigerant passes through the orifice of the expansion valve, due to the decrease of its pressure and temperature, the moisture in the refrigerant will freeze in the orifice, resulting in poor circulation of the refrigerant, increased resistance or no flow at all, resulting in the inability of the air conditioner to cool.
1. The air conditioner filter is dirty and blocked. The warm air of the car is blown into the cab by the blower. If the air volume is insufficient or the distribution of cold and hot air is not good, the heat of the warm air tank will not be radiated, and the temperature of the warm air will not come up.
2. Hot and cold air control of the heater box: the flap cable falls off, the heater impeller is damaged, and the flap falls off. If the knob is set to the warm air position, the air volume is large enough and the wind direction is normal, and cold air is blown out, then check whether the above problems exist.