1. Turn off the vehicle's engine first and wait for the engine to cool down before operating to avoid burns.
2. Open the engine hood of the vehicle and check the position of the heater water pipe. Typically, the heater water pipe is located inside the engine compartment, near the side of the cab.
3. Find the air inlet of the heating pipe. Usually there is a snap ring on the air inlet, which needs to be removed with flat-nose pliers or a flat-nose screwdriver.
4. After disassembling the air inlet, use flat-nose pliers or flat-nose screwdriver to remove the snap rings at both ends of the heater water pipe. Be careful not to damage the snap rings and water pipes.
5. Take out the heater water pipe from the vehicle, and check whether the water pipe and related pipelines are damaged or leaking. If there is any problem, it needs to be replaced or repaired in time.