Is the sound of water flowing in the water tank of the car heater normal?

The reasons for the sound of water flow in the car heater box are: 1. The reason for the sound of water flow in the car warm air tank should be that there is air in the warm air tank or there is air in the warm air tank, so that the sound of water flow will appear; 2. The hot air tank circulates the coolant in the car. When the temperature of the automobile engine rises. The coolant will also get hot. Heat the car; 3. When the warm air is turned on, turn on the warm air small water tank, and the natural wind will be heated through the water tank; The automatic air conditioner can be adjusted according to the existing temperature in your car. Automatic control of outside temperature. And the working process of the compressor.