1, prepare antifreeze and cleaning agent, open the sewer clamp of the car with carp pliers, and connect the pipes in the process of cleaning the water tank later.
2. Open the water inlet pipe of the warm air tank, and insert the mouth of the high-pressure air pump into the water inlet pipe of the warm air tank.
3. Turn on the air pump, and high-pressure air will blow into the whole circulating waterway, including the pipeline of the warm air tank. With the entry of high-pressure air, the residual dirty water in the cylinder will also be blown out. Add detergent and fill the water tank with tap water.