For us, we unfortunately had this happen to us earlier last year. They said it was a few leaves that got stuck in the assembly. I wouldn't doubt it as we generally get a lot of leaves around us. Good luck and hope they're able to fix it again without much problems.Anyone else has this problem, where the (heater/AC) blower starts to make a loud humming noise, and Infiniti having to clean this out? Happened for the second time in a year.