1, the cooling system is short of coolant.
Coolant, commonly known as antifreeze, comes from this, and its principle is different from that of household air conditioning heating. Automobile warm air circulation is to connect a pipeline in parallel in the small circulation pipeline of engine coolant, which is connected with a warm air water tank, and the blower blows the warm air water tank to generate warm air, which is how the air conditioning warm air comes from. The lack of coolant in the cooling system is the most common and easily solved fault phenomenon that causes the warm air not to be hot.
When designing the engine cooling system, engineers will give priority to engine heat dissipation, and then the warm air can work normally. When the coolant is insufficient, the coolant will circulate in the engine first. At this time, there is no "water" in the warm air circulation pipeline, and most of the warm air tank is gas. At this time, the air conditioning warm air is naturally not hot.
2. The heater water tank is blocked
The structure of the warm air water tank is actually a miniature version of the radiator of the engine water tank, and there are many small cooling pipes in it, which are as easy to block as the radiator of the water tank. After the inside of the warm air water tank is blocked, the coolant flows slowly, the flow rate becomes smaller, and the heat is insufficient, so the air conditioner warm air is naturally not hot.
3, warm water valve failure
It is actually an electrically controlled valve. The warm water valve is installed between the water inlet pipe of the warm water tank and the small circulating pipeline of the engine, and the opening of the valve is controlled by the air-conditioning computer, so as to control the flow rate of coolant entering the warm water tank and achieve the purpose of controlling the warm air temperature of the air conditioner more accurately.
After the hot water valve fails, the opening of the electronic control valve is no longer controlled by the computer, and it is in the state of normally open, normally closed or fixed position. At this time, there is no coolant flowing through the warm water tank or the flow rate is uncontrolled, so the warm air temperature of the air conditioner is naturally uncontrolled.
Extended data:
Matters needing attention in the use of automobile warm air:
The AC key is the switch of the air conditioner compressor. To use air conditioning in summer, you must turn on the AC button, that is, turn on the air conditioning; The warm air only uses the thermal cycle in the car, and there is no need to start the air conditioning compressor at all. So you just need to adjust the air conditioning button, and you can turn on the heater without turning on the AC switch.
In the cold season, we need to raise the temperature inside the car quickly. When the car starts, the engine starts to warm up. After the engine temperature indicator reaches the middle position, first turn on the warm air conditioner, and set the air circulation to external circulation, so that the cold air in the car can be discharged outside the car. After waiting for 2 to 3 minutes, set the air circulation to internal circulation. When it comes to rain and snow and the temperature difference between the inside and outside of the car is relatively large, the front windshield is prone to fog. At this time, we only need to adjust the direction of the warm air to the position where it blows to the front windshield, and the fog can be removed in a few minutes.
People's Network-Why is it so cold? In winter, the air conditioner and warm air are not hot as hell.
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