2. The heater tank is blocked. The structure of the warm air water tank is actually a miniature version of the radiator of the engine water tank. 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.
Extended data:
1, warm water valve failure
The warm water valve is actually an electric control valve, which is installed between the intake pipe of the warm air box and the small circulation pipeline of the engine. The opening of the valve is controlled by the air-conditioning computer, so as to control the refrigerant flow into the warm air box 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.
2, thermostat failure, the common failure of the thermostat is that it can't be opened, and the reason why the warm air is not hot due to the thermostat failure is that the thermostat can't be closed, commonly known as the thermostat is always open. After the thermostat is normally open, the coolant begins to circulate from the idle speed of the engine. In winter in the north, the water temperature will be low for a long time, and the air conditioning warm air will naturally not be hot.
People's Network-Why is it so cold? In winter, the air conditioner and warm air are not hot as hell.