The fan seems to operate for awhile before failing--it's hard to tell how long, as I live in SoCal & haven't been using it much yet (I've only had the car for 2 weeks). I 1st noticed the burnt blower/A/C fuse when investigating the problem with the power sunroof. I put in a new fuse & a few days later, noticed that, although the blower was working, the fuse looked like it was not long for this world.