Hello, my first post(on this forum) after some warm weather and a/c use I had some issues pop up with the fan. I believe I don't have auto temp type. I first noticed at fan speed 3&4 the fan would sometimes go to a higher speed for only a second or 2, then one morning on my way to work the fan was left on 2 from the day before and it wasn't working at all, I moved the selector back and fourth even off...nothing. After stopping for gas I got the fans to work on speeds 1-3, and a humming noise on 4. I checked the fuses for 1-3 and for 4 and although the fuse for the 4th spd was not blown, one spade on that fuse had a blue/black stain or burn mark on it. Does this sound like the resistor problem I've been reading about?