1. Switch the connection positions of two warm air water pipes, that is, the warm air inlet pipe is connected with the return pipe of the small water tank, and the warm air return pipe is connected with the inlet pipe of the small water tank;
2. Use the pressure of the engine water pump to backwash the small water tank, so that the impurities and dirt deposited in the small water tank are washed back into the pipeline, and the heat exchange capacity is restored by replacing the antifreeze.
Automobile warm air heat exchanger, commonly known as warm air small water tank, is not easy to maintain in use, and the coolant is improperly selected, which is easy to be blocked by impurities. The specific phenomenon is that the temperature of the vehicle is normal, and the wind blown by the warm air is not hot, so it cannot be heated normally. In the case of hot car, there is obvious temperature difference when touching the warm water pipe, that is, the small water tank can be judged to be blocked when the warm water pipe is hot and cold.