It looks to be mounted with brackets to parts of the body and a metal bracket that goes from one end of the radiator to the other. Not sure if everyone has this or not. As far as when it kicks on I don't believe you are right Brent but I can't be sure. I hardly ever {usualy never)run my air and and I know I have heard it kick on while sitting at a drive through without the air on. Again something I wont sware to but can almost be sure. If needed I can take pictures and also see when it kicks on and off. Guess I never really paid much attention to it before.