Several years ago, I got a call from a fellow whose house hold AC wasn't cooling. Rheem, split system. I checked the gages, amps, air flow, and so on. I was really stumped, as to why it wasn't cooling. I posted to this list, and got some wise acre answers. Turtle asked some questions. From what I could figure, at least a couple of the guys had an idea what the problem was. But they weren't telling.
I called my old boss, who told me what the alternating havoc posters refused to say. And, so, I was able to repair the system. That was some years ago, and my skills have improved. No thanks to the regulars here. I read this list like I watch car wrecks as I drive by. It's terrible, but I got to look.