I have a 91' 300E that blows fresh air through the defrost vents when the climate control is off. When the climiate control is on, I still have air blowing through the defrost vents no matter what selection button I have choosen.

Is this an actuator / servo problem?

The big question is: how much of a job is this to repair/ replace the faulty item, as I am sure it is buried deep behind the dashboard?

Anyone out there ever done this?

Help.

Don