Originally Posted by frankengrant

I'm trying to improve the strength at which it blows, the other day on the highway something weird happend, I was going about 80 and my center vents started working, the A/C started blowing very hard as well. I can't get it to do it again, the center vents are closed again and I am not able to get them to reopen. The A/C now blows with the same medium strength it always has, cold, but weak.