I have a failed speed control as well. I suppose it is the resistor pack that is the problem. The 3rd speed works. However, the heater fan is terribly noisy. The bearings must be failed. I need to get to the fan and cannot see how to get to it to remove it and replace it. I have removed the drawers that are on the passenger side of the dash and the cover for the AH blower at the bottom of the center console but can see no attachment points for the dash itself. Has anyone accessed this fan on a 2005 Dynasty? If so, I would sure appreciate some guidance. I have looked for the resistor pack and have not been able to locate it either. I looked around the AC evaporator on the outside firewall and didn't see any wiring that may have been attached to the resistors. I hate to destroy the dash and surrounds by trying to access the blower.
Bob R
2005 Dynasty Countess lll