why am i not getting any heat in my 1994 corvette ? my blower works and my air on 1994 Chevrolet Corvette

my tempature on my dash reads 90 degrees but i still dont get any heat

Asked by for the 1994 Chevrolet Corvette
ck coolant level and then also ck thermostst for proper operation
1 more answer
some times if you use the wrong anti freeze in a GM car the whole cooling system has to be flushed.