If your AC is on... without the aux fan running, it will cause overheating.
With engine and ignition off, check the aux fan first... does it freespin or
does it have too much resistance? If resistance, then this is the reason why
it keeps popping your fuse... too much draw to move that motor.
You can further test this by having engine and AC on... does it spin fast? I
know it is noisy to begin with but is it like terribly wrong noise if
If so, the fan is probably bad and you need to get another used one.