I absolutely love this air conditioner. It is so quiet and cools my space with ease. My one complaint is that it makes this high pitch noise that is pretty hard to ignore once you notice it. I have searched all over to see if someone else has this issue but to no avail. Please let me know if this is a known thing and if it's fixable! The unit performs flawlessly though so it isn't a deal breaker, just want to fix it!