I don't think that's true. Climate control swaps are pretty much non-existent in our cars, but in general, the ACC system is more reliable. I've heard more people complain about how they can't program it to not come in than have actual problems with it. One guy actually did switch a manual climate control system to ACC, but he had a donor car so he had all the parts handy. There are a ton of them.If I'm not mistaken, most people prefer to do the opposite because of the issues that come along with the ACC.