osteenjames Senior Member Joined: 1 Aug 2013 Posts: 50 Location: St Paul Minnesota Expertise: I love coffee
Posted Thu Oct 17, 2013, 3:59pm Subject: Re: Nouva Simonelli Oscar Machine makes buzzing sound
I finally figured how to make video. I put video on utube just copy below link into your browser and you'll go straight to u-tube video. The buzzing sound occurs after I power machine on and then stops. I bought machine used and it makes wonderful espresso. Date on bottom of machine indicates machine is 8 years old. I've have machine a few months and back-flush once a month. I dont think machine has ever been descaled. I have a water softner system in my house so my water should not be that hard.
Markarian Senior Member Joined: 27 Jun 2012 Posts: 658 Location: Seattle Area Expertise: I love coffee
Espresso: ECM Technika IV Profi WT-WC Grinder: Baratza Forte AP, HG One Vac Pot: Bunn Trifecta MB Drip: Moka, Aeropress, Hario V60 Roaster: Behmor 1600
Posted Thu Oct 17, 2013, 7:21pm Subject: Re: Nouva Simonelli Oscar Machine makes buzzing sound
When you shut down your machine, a little bit of water from the steam that was inside the boiler condenses inside, minimally lowering the water level through normal evaporation. When you power your machine on, these brief buzzes will happen almost certainly as the pump tops off the boiler and the autofill probe is satisfied you're at full capacity. The bubbling and gurgling is your heat element starting to boil the water (the left lamp indicates your heating element is active). Your machine looks like it's in fine shape. Just remember to plainwater backflush at least every day. That gets 90% of the crud out. It's good that you have a water softener because descaling the Oscar is a concept by which we measure our pain.
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