I started hearing a clicking noise coming from deep in the dash when I turned the temperature knob from warm to cold. I went to the internet and checked to see if there was a solution to this problem. What I found out was that Nissan is plagued with this problem. Probably a design flaw but they don't offer any resolution to the issue. Basically they know there is a problem but it's cheaper to ignore it than it is to fix it. So now I am going to have to shell out close to $1000 to have it fixed. There is so many failures, this should be a recall item.