The second generation warm air of Chang 'an Star is not hot. Later, it was found that the warm air channel did not circulate water. Why did you change the heater tank and water pump or not circulate w

The second generation warm air of Chang 'an Star is not hot. Later, it was found that the warm air channel did not circulate water. Why did you change the heater tank and water pump or not circulate water? According to what you said, it is logically unreasonable, but it is true. You can try this: there are two pipes connected between the engine and the heater water tank. One is that the engine coolant (warm water) comes out into the heating box, and the other is that it comes out of the heating box and flows back to the engine. First, take down the end that comes out of the engine and enters the heating box, and start it briefly to see if there is any water rushing out. If it is explained that there is no problem, connect the pipe to return the warm water tank to the other end of the engine, and then start it to see if there is any water rushing out. If there is, it means there is no problem with the warm water tank. If not, the problem is the warm water tank. If the warm water tank proves to be all right, logically speaking, there should be warm air when connecting the pipeline, but if there is still no warm air after connecting, the problem is that the connector returning to the engine is blocked. In short, it is to judge and check one by one, and maybe you can find the problem. I wish you success! One more reminder, you must have a thermostat core, otherwise there will be no imaginary warm air.