[Mr 5 0]

To lower the temp on the cooling system, leave the defroster alone.

Just turn your heater control knob to the red side (heat), set the dial to 'vent', open the dash vents and turn the blower on 'high' for a few minutes. This draws some heat out of the cooling system (and into the cars interior). It's going to be very uncomfortable for you but it always lowers the temp on a properly operating cooling system. I did this many times in cars with less than optimal systems and it never fails. Of course, if you have a serious cooling problem, it will only help for a short time before you eventually overheat.

FYI: I replaced my rotted-out 2-row radiator with a Ford 3-row radiator in 1999 and never had a cooling problem from that day on. The 'Police-Duty' fan I installed with the radiator probably helped, too, along with the dose of 'Water Wetter' I used. All recommended.