How to close the valve of Wuling Hong Guang heater?

Wuling Hong Guang heater has no valve, so just turn off the air conditioning system. Turn on the heater as follows:

Step on the brake pedal of Wuling Hong Guang.

Second, twist the car key of Wuling Hong Guang and start the engine.

Third, run the engine until the water temperature rises to 90 degrees Celsius.

Fourth, turn the wind speed knob to the maximum right to turn on the air conditioning system.

5. Turn the temperature adjustment knob to the right to the red area to turn on the heating mode (turn it to the left to the blue area to turn off the heating).

6. In winter, press the internal circulation button to start the internal circulation system to save heat energy.