The warm air water valve is the warm air switch of the automobile heater. The radiator in the heater is connected with the circulating water of the engine through the water inlet and outlet pipes. The water valve is a switch. The water valve is opened, the waterway is connected, and the circulating water of the engine enters the radiator. The fan blows heat into the cab. Otherwise, the water valve is closed and the warm air doesn't work.
Extended data:
Precautions:
When the car starts, because the engine needs to drive the condenser and blower to start together, the fuel consumption will definitely increase at this time, which will also lead to the loss of battery power.
So, be sure to remember to turn off the heating when not in use. Even if the car is always on, it is not suitable for continuous heating, which will cause damage to the condensation system. It is suggested to shut down for a few minutes after 1 hour.
Baidu encyclopedia-Audi A6L
Baidu encyclopedia-automobile heating system