my air conditioning was working fine until it started to get real hot. now whenever i turn it on it immediately blows the fuse, and hot air blows out the vents even when nothing is on. a check engine light came on about the same time, i looked it up, and it says something about idle speed sensor. could these problems be related? i figured it was a short or something was drawing too many amps but i haven't had a chance to take a good look at it. does anyone know where i should start?