Took my 05 saab 9-5 in to find out why my heat and ac are not working car is in very good condition other then this problem. They wanted 1200 +++ $ to fix they told us it was a vacuum issue now the AC work when we bought it and we took it into a shop they got it to work for a day AC pump kicks on just no temperature difference when you change it on the panel. Its got to be something easy. Looks like we have to go this winter with no heat thanks Chevrolet will never go back there