How to clean the Wuling Light Warm Air Trough?

Clean the heater water tank. First of all, we need to find the warm air tank and the water inlet in return pipe, and then return pipe, who dismantled the warm air tank, burned the car and turned on the warm air. At this time, there will be water flowing from the return pipe of the warm air tank, and we only need to add fresh water to the tank for cleaning, so that the warm air tank can be cleaned circularly.