I had similar sounds coming from mine. At one point, it was much worse than that, and I took it to the SC. They said a “piece of tape” was flapping against the fan. It was fixed. Now I have a similar sound to yours that is intermittent. When I made my last SC visit, I told them about it, but, of course, it was not making the noise when I was there, so I still hear it about half the time.