Got the usual probelm of the heater blower playing up on my Focus, from perusing the web, it appears that the resistor pack shorts out leaving the thing on it's default full blast setting, however, mine only works on position 3, all the others are dead, plus, whenever you do switch on to 3, it goes quick and slows down after a second or two, I'd like to know if this tallies with a blown resistor or switch before I shell out for the wrong part!