The activation method of the 12th generation Crown air conditioner heating is as follows: 1. Start the vehicle first. If you don't start the vehicle and directly release the warm air, it will make the line easy to burn out. Don't put hot air immediately after getting on the bus, because it is often cold around and the temperature of the fuel tank is very low, so the wind sent is likely to be cold air, which will damage the engine and affect its service life. 2. Turn on the external air circulation, and turn off the external air circulation and turn on the internal air circulation after the air in the car is basically replaced. You need to wait a few minutes until the air circulates, and then you can enter the next operation. Note that the car and the arrow mark buttons are air circulation systems, and the arrow mark buttons pointing to the inside of the car are external circulation buttons. 3. Find the knob marked "AC" and adjust the temperature to above 25℃ .. The temperature display is not red and blue, but a number. When the temperature is above 25℃, warm air will be sent out, and the temperature will be adjusted in time.