Seeking advice re A/C failure. Help!

[alottman]

I have a 1993 740il.

Yetsreday, I suddenly blew an a/c fuse. The fuse also covers horn and aux water pump, but it appears to be the a/c that is causing the fuse to blow.

As soon as the a/c is turned on, the fuse blows. The correct fuse is 15A. I installed a 30A fuse just to see what happens, and the a/c worked fine for the few seconds I let it run.

1. Any diagnosis or steps to take towards pinpointing the problem would be greatly appreciated.

2. Any thoughts on the risks of running with a 30A fuse until parts can be obtained and repair made (remember it's hot as Hades here).

Many thanks!

[hal9000]

Can you run the "heat", ie run everything in the ac system except for the compressor itself? If so, chances are you've got a compressor going bad. Otherwise, it'll probally be a blower resistance issue.