Thanks for the response. I have replaced the blend door actuator about 1,500 miles ago. It is a lot of fun to do. I know that noise. This sounds higher in dash and less solid. Also, If I turn off system at EATC before starting car and let run a few seconds I don't have the problem. I have read that their is a similar actuator motor that controls the air vent flow direction(defrost, vent, defrost/floor) as well as a vacuum check valve. I just can't find info on how to get to them and test them.
Thank you again.
Saturday, September 21st, 2013 AT 4:09 AM