That's a temporary fix... Since mine was doing it, I did a lot of research, and it's the blend door actuator. I posted more info here...I had the same problem last week. My battery needed to be replaced. After replacing the battery the ac was blowing one side hot one side cold. I turned the ac off, disconnected the battery and waited for like an hour and reconnected. Turned the ac on and it is working. It has been 5 days will post if it does it again.