If the warm air pipe is hot, the warm air water valve is in normal working condition;
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 warm air water valve is the warm air switch of the automobile heater. The working principle of the automobile heater is that the radiator in the heater is connected with the circulating water of the engine through the water inlet and outlet pipes, and the water valve is a switch: when the water valve is opened, the water channel is connected, the circulating water of the engine enters the radiator, and the fan blows heat into the cab; On the contrary, the water valve is closed and the warm air doesn't work.
Extended data:
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.
Phoenix. Is the com- air conditioner heater broken in winter? It turns out that they are the culprit.