When the air conditioner is turned off, the golf ball cannot get warm air. What happened?

The heater is broken. The reason why the golf car can't get warm air when the air conditioner is turned off is that the heating is broken. Golf is a compact hatchback owned by FAW-Volkswagen, also known as A-class car. In terms of body size, the length, width and height of golf are 4 199mm, 1786mm and 1479mm respectively.