What did I do? A/C blower E420 burned strip fuse holder

[1stimer]

So my blower has been giving me problems. I diagnosed that I needed a blower regulator in my 1995 E420, so I bought a new one and put it in.

I have a spare blower motor and have been looking for replacement brushes for it. I couldn't find any in the correct size, so I ordered some from Ebay, and they are on the way. I THOUGHT the current blower motor still had some life left...

At this point, I had high fan speed and lo fan speed, but no auto functioning. I found my aspirator blower was not running, so I ordered that motor and have it now.

Suddenly, while A/C blower on high, the blower cuts out, and I see some smoke coming from the drivers side engine compartment. My 30 AMP strip fuse holder is completely melted.

I realize I should have just replaced the blower motor brushes when I did the regulator, but I didn't and now I have made things worse. This seems to be a recurring theme with my DIY projects. Grrrrrrrrrr! Anyway, what do I do now?

I have the brushes coming....hopefully next Monday. What do I do about the burned fuse holder and wires? How do I figure out what caused this....or rather how because we know the what (me!)?

Any help is greatly appreciated. It is ~100 degrees.

[macdrone]

bearings needing grease in the blower motor did you in. Brushes were probably fine. The resistance in the blower motor didnt pop the fuse but heated it slowly till it melted stuff, Drawback to a wide fuse slow pop. My aux fan fuse did it, its against the firewall and is the same type of fuse.

[1stimer]

I am not comfortable at all with electrical issues, so I took the car in to Enrique. He diagnosed the problem as a connector from (to?) the ignition switch. I also had him replace the aspirator blower motor for the cabin temp sensor. The problem now is there is a loose connection somewhere from the aspirator to the temp sensor grille, as the paper on the grille does not hold. AC is working great.....just no auto functioning.