Gelignite

I just opened the electrical box in the engine bay to replace the blower fuse, which had blown again (I knew this because the front blower fans were working eratically again) but this time it wasn't just blown but a molten mass. I knew when I replaced it last time I was taking a risk without investigating the cause of it blowing but thought I would try one more time. Now I am going to pay for my mistake
I'm not sure if this will be the whole board or if just the fuse holder assembly can be replaced but when I fix this I am going to find the cause this time!
At least it doesn't stop me driving it
Steve