The car's heater water tank switch is behind the instrument panel: 1. Most car heater water tank switches are installed in the middle of the back of the instrument panel. You have to remove the instrument panel to see it. The heater pipe behind the engine is connected to the switch. The warm water tank is installed toward the instrument; 2. The warm air water tank is just a heating component in the thermal air conditioning system. When the water in the engine flows through the warm air water tank, it heats the warm air water tank, and the fan works, facing the heater. The Feng Shui box blows air, and the air is heated when passing through the warm air water tank, then the warm air comes out of the air outlet; 3. The condenser is a heat dissipation component in the cold air conditioning system, just like the water tank, which is used to dissipate heat to water. , the condenser is used to dissipate heat to the refrigerant. The quality of its heat dissipation directly affects the cooling effect of the air conditioner.