[steely]

Hi cooldaddy - congratulations and welcome.

I think something is up here too.
What is mysterious to me is the relationship between the power window fuse and your AC blower intermittent power drop-out. My fuse box lid has a card listing the location as a 25A as well, but I think you have another problem and perhaps should holding up until you eliminate it before replacing the 16A with a 25A.
Does it happen a lot, or when/if you operate the windows?

I think your radio wiring technique was probably ok, but again there is this coincidence.
The only thing I can think of would be to consider (FIRST) REMOVING the battery ground cable so you can inspect and clean the fuse block one fuse at a time (light emery). You might consider cleaning the ground points in the trunk as well.

Sometimes this cleaning can help, but if it doesn't it will require some more investigating of course. The only reason I can think of the fuse blowing would be due to an intermittent short in the power wiring from this fuse up to the wiring of the 3 door switches or the 2 motors. The power window relay is not in this circuit. But neither is the blower. :-(

If it does help however, then try replacing the fuse with 25. Although you could try your luck and do this first, but if there is a fault, now you'll need 25A to see it.

I hope this helps a bit. Let us know your progress.