O.K., I am in desperate need of a good guess as to what the heck is wrong with my car. Klaus was the only previous respondent and he told me to go thru the glove box and check behind it to see if the main flap linkage for the windshield was broken.
Here is my problem: This morning it was 50 degrees F. outside temperature.
All windows are clear. As soon as I turn the heat on, regardless of whether it is set to defrost or just compartment heat, within 2 minutes I could not see out of any window. When I turn the setting to defost and close the front vents, there is no immediate clearing of the windshield at all. In fact the rest of my 25 mnute commute the windshield never clears. This has become a safety hazard as I am constantly wiping the inside of the glass with my hand to clear it.
I really can't afford to go to the dealer right now so any inputs that might make some sense would be most appreciated.
It also seems there is some residue on the glass when I wipe it off with my hand and this may be due to the fact that I think I need to replace the heater core. I have been losing a fair amount of coolant on a regular basis without knowing where it is disappearing to.

Thanks!