NEED HELP WITH BK MINI 180

[Galizio]

So I purchase this bk mini 180 off a forum member. The skimmer work great and pulling a lot of gunk. So I got the skimmer, first few hours didn't skim because was just cleaned, after a few hours start pulling a lot of poop so no issue there. Woke up the next morning to a loud vibrations noise from the skimmer, so I turned the skimmer off, then back on and the noise was gone, after a few hs noise is back on. I did this 3 times and 3 times same thing.
So last evening I pull the cup out, rinsed and the noise was gone, overnight fine , then that humming noise again... anyone have an idea? I'm thinking maybe the way the power cord sits underneath the skimmer(maybe)have to say the noise is a bit less than yesterday and there is lots of room around the skimmer so nothing is touching..
if anyone have a clue before I take the all unit apart which is probably the best thing to do.


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