One item that was different between the actuator I swapped and the one I replaced was the positioning of the control arm. Think I will start there. Thank you all for the responses. Much appreciated.
Pretty sure the one I replaced had something to do with the modes; knocking noise became an issue when I would turn on any function essentially. Just strange because my defroster worked before I replaced the actuator.
Not sure exactly what actions the one I replaced controls, however I essentially had to take the glove compartment out to get to it; there are two actuators once you take the glove box out and I replaced the one located higher up behind the dash.
Need of some help. 2008 mustang gt, a month ago was making knocking sound from dash. Replaced the actuator making the knock and it stopped. However, now my main defroster setting for the windshield is not operating; only blows air through the foot vents. Any advice or tips would be greatly...