Passat leads the warm wind. What happened?

The reasons why the on-board heater of Pacific Auto Network is not hot are: 1, the air conditioning filter element is dirty and blocked, which affects the heating effect of the heater; 2. The thermostat is broken, which leads to the large cycle of the refrigeration system prematurely, resulting in the warm air not being hot; 3. The warm air control button is broken, and the corresponding warm air supply signal cannot be transmitted, resulting in warm air; 4. The small water tank of warm air is blocked, so that the coolant cannot pass through the small water tank, and the warm air is not hot.

The working principle of the heating system: the engine works to generate heat, and the coolant is heated to cool the engine. When the engine reaches a certain temperature, the ACC control module will control the air conditioner water valve to open, and then the heated coolant will enter the heating water tank through the water pipe, and the heating water tank will transfer heat to the passing air, and then the blower will blow the heated air into the car to realize the heating function in the car. ?

The troubleshooting steps of automobile heater are as follows:

(1) Slow or non-rotating speed of the blower: check whether the blower motor and speed regulating resistor are damaged, and if so, repair or replace them.

(2) Waterway blockage: Check the drain pipe and replace the radiator if necessary.

(3) The water pipe joint falls off or the water valve fails: connect the fallen nozzle and replace the failed water valve.

(4) The temperature damper can't return normally: Adjust the temperature damper according to regulations, and replace it with a new one if necessary, so that the temperature damper can return normally. ?

(Photo/Text/Photo: Pacific Auto Network Liang Kexin)