700 series, with manual temperature selection, have a reputation for not being able to completely shut off all of the warm air when the manual temperature selector is fully off. The problem is the flapper door in the heater is not fully closed. There is an adjustment for this in the cable, just behind the heater control. If you remove the glove compartment, you can see the heater controls. The cable on the bottom controls the flapper valve for heat. The adjustable part of the cable is at the heater control. If you see a larger part of the cable, about 3/8 inch and about 2 inches long, that is it. Turn that larger part of the cable until you can feel the temperature control knob moving off of its left hand stop. You are done! I might add that my wife is again happy with her car.