2. Secondly, insert the mouth of the high-pressure air pump into the water inlet pipe, and then turn on the air pump. High-pressure gas will blow into the circulating waterway, blow out the dirty water inside, add the prepared cleaning agent, then fill the warm air tank with water, start the vehicle for 30 minutes, and turn on the warm air conditioner.
3. Finally, repeat the above steps for 3 times, and then clean when the discharged water becomes clearer and clearer. Finally, add the prepared antifreeze.