Heater control valve might be bad.
I just re-read your first post. Did you mean to title this "Blower fan not working"? If your blower fan is good (tested connecting directly to power source), and your fuses are good, then I'm gonna say it's the actual fan speed switch. You might have to replace the whole climate control unit. Usually you can get them out of a junkyard for $30
Last edited by themonsteraria; 10-12-2010 at 02:33 PM.