Can anyone help, Heater fuse #24 keeps blowing.

What is your question?

I have 97 es300 Lexus and the other day my a/c control lost all power. After investigation I found that the fuse under the steering wheel marked heater 10 amp was blown. I replaced it and got power, for about 5 seconds before it blew agian. So I tried another, and another the same thing. I tried putting a 30 amp fuse to see what would happen, so now the power stays and it's blowing air but my a/c light is flashing and no cold air. I think maybe there's a short but not sure. Has this happened to anyone, or does anyone have suggestion's?