2. Unscrew the water inlet pipe of warm air small water tank with carp pliers, and pull out the pipe after the clamp is opened, which is the key to get through the warm air small water tank. Insert the nozzle of the high-pressure air pump into the water inlet pipe of the small warm air tank.
3. When the air pump is turned on, high-pressure air will blow into the whole circulating waterway, including the pipeline of the warm air tank. Then high-pressure air enters and the dirty water remaining in the cylinder is blown out.
4. Add cleaning agent, then fill the water tank with tap water, start the vehicle for 30 minutes, and turn on the warm air.
5. Add water three times like this. Before each water change, dredge the pipeline with high-pressure gas. Every 10 minutes or so, the color of the discharged water will also become clear. Finally, add antifreeze.