The water tank is under the workbench. You can't touch it. There is a plastic shell of the heating component outside, but you can touch the hot and cold air transfer door. Keep pulling back and forth to find the hot and cold air conversion door. You just need to readjust the cable. If the hot air is small, the surface of the water tank is blocked, and the phenomenon of internal blockage is that one pipe is hot and the other pipe is cold, and the hot and cold air switches are not in place, and both pipes are hot.
If the cable of the car heater is damaged, it can only be replaced, not repaired.