Maintenance of BMW 730 warm water valve: In the season when the weather is not cold, the warm air inlet valve can be closed to isolate the engine cooling system from the warm air valve. In cold winter, before using warm air, check whether the left and right air supply pipes and air inlet and outlet pipes are loose, falling off and broken.
The hot water valve of the car is broken: after the temperature rises, the wind coming out of the air outlet is still not hot. Can't turn off the heating. After the temperature drops, hot air still comes out of the air outlet. In the automatic mode of turning on the air conditioner, the temperature inside the car can not reach the constant temperature effect.
Extended data:
The functions of BMW warm water valve are introduced as follows:
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. If the thermostat is always on, it will also cause the warm air to be not hot. After the thermostat is normally open, the coolant will circulate from the idle speed of the engine.
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