Blower Motor Fuse Melting

My blower motor fuse has melted, but not blown. I've re-terminated the Black/blue wire on the fuse panel and tried another (30A) fuse, and it is still getting hot. My partners Karoq has a 40A fuse in this position, but I'm pretty sure that the 30A was correct for the Octavia. Anywho, I was thinking that I should change either the blower motor or the resistor pack, and was wondering if anyone had a similar issue as I don't really fancy buying both (if I can help it).