I'm right there with Heath on doing the cooling flush and or checking wiring for the temp issue. Assuming your coolant is full and there's no air in the system.

On the SC. I've been able to do this in my garage w/o a press. The toughest part is having the proper SC pulley pulling tool on hand for the actual pulley. Once that's off, I've used basic stuff and a general 3 jaw puller for the bearings. A press is nice, but not always 100% necessary.

On the blower speed. I know the resistor is the typical issue, didn't I also hear that the ignition switch could be the culprit on this too?