I just baught a 2008.5 the a/c seemed to be working normal when i brought it home but now the a/c blows on high all the time weather on low, medium, or high and when i turn the a/c to the off position the fan stays on and blows vent air on my feet on high. It did it a few times last week and would go back to normal and now it seems to be stuck that way. any help please.