I had a similar issue. I was not blowing fuses, however. I went with the fan linked above. There was lots of debris in the fan housing. My fan is on the drivers' side just behind the foot well for the drivers door. I would like to find a removable cover for the fan that would be in place when driving.
Thanks everyone for your replies. I wanted to close out this thread with a summary of how I fixed my star cool rear air-conditioner. I bought a 14 inch 12 V DC fan that was an exact replacement. I started with the 9 inch fan as recommended by other members on different threads and it turned out to be the wrong size for my van. I removed a couple of trim covers and the front grill as well as the hood latch to replace the fan. It took about three hours total so I consider myself lucky and I am thrilled to have a working rear air conditioner again. Cheers !