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Bezzera BZ99 False pressure and start up
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nygel74
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Joined: 2 Jan 2006
Posts: 46
Location: USA
Expertise: I live coffee

Posted Mon Jul 1, 2013, 4:24am
Subject: Bezzera BZ99 False pressure and start up
 

Alright, this just started happening to me and I just thought I would toss this out to see if I am headed in the right direction.  Up until yesterday afternoon the machine worked flawlessly, but when I turned it on it seemed to heat up rather quickly.  I dont know why I do this, but i always open the steam wand on the machine, usually because it has been sitting for a little while and it kick starts the reheat process.  Anyway, when I opened the steam yesterday, the pressure gauge fell to zero and a piddly amount of steam shot out.  The machine then started to heat up again and then no issues.  The same thing happened this morning.  After getting of the initial shock of my favorite machine in the entire house started to act weird, I wondered if the issue is with the vacuum breaker?  If it is the breaker, is there a fix, or just a simple replace?  Thanks again for the help!!!


...nygel74
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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,456
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
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Posted Mon Jul 1, 2013, 6:51am
Subject: Re: Bezzera BZ99 False pressure and start up
 

I believe you have correctly diagnosed the problem. You could try removing the vacuum breaker and soaking it in a descaling solution. While the machine is opened and you have the valve out, check for scale in the boiler. If you can see in it well enough, remove the wire from the water level probe and remove the probe assembly from the boiler and examine that as well as it is a good indicator of scaling.

 
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nygel74
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Joined: 2 Jan 2006
Posts: 46
Location: USA
Expertise: I live coffee

Posted Mon Jul 1, 2013, 7:59am
Subject: Re: Bezzera BZ99 False pressure and start up
 

frcn,

  Thanks for the confirmation.  I am not new to the hobby, but am very new to working with the inside of the machines, and its always good to ask advice instead of learnt the hard way.  I think I will indeed remove the valve tonight and set it in some solution to see if that helps as well as order a new one just to have around.  I just descaled the machine about a month and a half ago, but then again, probablems always seem to creep up after that.  Thanks again, really appreciate the info!


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