Car window defrost

I own a 2003 and a 2004 cavalier . Both have had this problem with the defrost when it is cold. The defost damper is controlled by a stranded wire push/pull cable that is connected to a lever controlled by the vent position knob. It is a bad design because with increased friction of the damper when it is cold the stranded wire cable kinks instead of sliding into the cable sleeve to actuate the damper to the defrost posiiton. The cable is located under the dash above the end of the floor console. To get the best view, lie into the passenger area with your head on the floor mat. To fix this simply pull the ring end of cable off the lever attachment and straighten the cable then reattach it. For a permanant fix, straighten the cable and apply plumbers solder flux to the cable strands near ring end. Then with a pencil soldering iron melt solder into the strands next to the ring end for about 3/4 inch. Apply just enough solder to melt into the stands but not bubble or drip. This will stiffen the cable strands and prevent it from kinking again. Attach the ring end to the lever after it is cool.

CHECK VACUME HOSES UNDER DASH