Illustration of the inlet and outlet pipes of Dongfeng Xiaokang heating water tank

The method is as follows: Loosen the drainage plastic screw under the water supply tank and water will flow out. When unscrewing it, pay attention to the fact that there is a rubber ring on the plastic screw. When the water tank is filled with water, the flame is off. After the water tank is drained, start the car, idle, and turn on the heater for 20-30 seconds. This allows the residual water in the heater pipe and cylinder to be pumped out. At this time, you can basically...