问：交流线冷，汽车不吹AC；热打击真的很热，只有所有线被替换并检查了保险丝

Hello. It is possible that your blend door actuator has failed. This is the part that controls your blend door. The blend door is responsible for blocking off the heater core when your A/C is on to prevent the hot air from coming through the vents. I would recommend having your blend door actuator inspected to determine if it is working or not. If the blend door actuator is not working I would recommend having it replaced by a qualified professional. A technician from YourMechanic can come to your home or office to诊断为什么您的AC不起作用并进行必要的维修。