Chevrolet S-10 Defroster Not Working

I Drove 280 Miles Tuesday And Everything Work Find This Morning On The Way To Work I Turn On The Defrost And It Didnt Work My Temperature...

The Ventilation Settings Haven't Been Working Properly For The Last Few Months. At First It Would Work Some Days And Others Not?! Now It...

Of Course, It's The Dead Of Winter And The Defroster Quit. Heat Is Still Coming Out, But The Fan Won't Start. It Worked On The Way To Work...

1989 Chevy S10, Heat Works Great But When I Switch To Defrost There Is A Burning Smell Like Antifreeze And My Defrost Will Not Work. Any...