On the weekend I replaced a ceiling fan in our lounge room from 48 inch to a 56 inch fan, Yes replaced the controller too that come with the Martec fan but once starting the fan I noticed that had a slight BUZZ on slow and in medium it was a little louder and forget high speed as it hummed more.
After this I checked everything (the Ball) and make sure it was seated correctly via the pin and that was ok, tightened all the blades and other but it was the same, it had a very,very slight buzz. I contacted the Manufacture and explained it to them and still waiting for full reply. Now the First one I got 5 years ago for another room is the same brand and type, same size and it does not hummmm at all but if I can hear something humming its my brain trying to trick me but when I go back to the new one that is only 4 days old it defiantly hummmms.
What I have Noticed:::
After running the fan for 24 hrs its quieter but I can hear it BUT!! if I move 0.5M on one position either left or right the noise is Gone but if I move to another position it on again and mover little to another position its gone but if I find the location of the room that is worse them lie on the carpet it GONE but if I crawl on the carpet and stick my head up the buzz is back again. What in the F@#$%^K is going on. Could it be the speed capacitor causing this issue. Yes the Wife has come with the same conclusions, something going on in this room and this fan, can't be a Harmonic issue or am I confused or the issue is above my pay grade.
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