Nissan Altima AC clutch issue. Easy fix for $1. 

My AC was sometimes running and other times not. This is a quick and simple video on troubleshooting the issue. Basically, when it was not working I used a small stick to tap in the clutch to get it engaged. That was a temporary solution until I went down my hood, took a closer look, and found the problem. Fix was for $1 guys. I am not kidding.