Oct 31, 2014. #6. LaytonJnr said: Hello, One of my fans (the stock 140mm) in my Phantom 410 has started to make whirring and/or grinding noise. It seems to be pretty intermittent, and I am yet to find a pattern. The only time I've heard that kind of noise before was on a pretty old 80mm fan, which was due to the bearings.
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