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Help: Gaggia Classic brew pressure / scale problem
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SWR
Senior Member


Joined: 24 Sep 2005
Posts: 80
Location: San Diego
Expertise: I love coffee

Espresso: QM Anita
Grinder: Mazzer Mini E
Posted Sat Sep 24, 2005, 9:58am
Subject: Help: Gaggia Classic brew pressure / scale problem
 

I've searched the posts for a while now and think I know my problem, but would like your help and advice:

My ~6 year old Gaggia Classic started having a problem yesterday: The amount of water coming out of the brewhead decreased, and the "motor sound" when the brew function is activated sounds muffled and lower than usual as it sounds when the portafilter is too full (i.e., it sounds like it's backed up and not able to fully release the water out of the PF). This problem occurs with the PF and screen out, so I've eliminated the possibility that it's one of those items.

I clean my machine twice a year with CleanCaf and use filtered water, but I suspect that I have scale buildup in the broiler and/or lines. I took off the head gasket and found sediment deposits of a scale looking substance.

I ran CleanCaf though it today, and it still has the same problem. However, the water flow and "motor noise" are completely normal when running the cleaning solution through the frothing wand. The muffled sound and reduced water only occur when running the solution or water through the brewhead. Thus, it seems like there's a scale clog somewhere in the line going to the brewhead.

Any suggestions on if I've correctly diagnosed my problem and/or ways to resolve it short of taking apart my machine? I found the very thorough article on rebuilding a Gaggia machine which details how to open up the machine and clean the scale, but I don't have all the tools required.

Also, if professinoal repair is needed, recommendations on a good shop in Southern California (preferably San Diego) would be appreciated.

Please help a fellow espresso addict get back to my daily fix.
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kaanage
Senior Member


Joined: 31 Mar 2004
Posts: 1,452
Location: Melbourne, Australia
Expertise: I love coffee

Espresso: Bezerra BZ99, Gaggia...
Grinder: NS MCF, Imat Lux, Cunil...
Posted Sun Sep 25, 2005, 7:19pm
Subject: Re: Help: Gaggia Classic brew pressure / scale problem
 

It sounds like the feed to and from the solenoid in the group or else the solenoid itself are the culprits. If it were me, I'd take it apart since it's pretty easy. You could try doing a load of backflushes to see if that clears things a bit.

Greg

 
do'in it on the cheap
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SWR
Senior Member


Joined: 24 Sep 2005
Posts: 80
Location: San Diego
Expertise: I love coffee

Espresso: QM Anita
Grinder: Mazzer Mini E
Posted Sun Sep 25, 2005, 9:27pm
Subject: Re: Help: Gaggia Classic brew pressure / scale problem
 

Thanks, Greg. Tried the backflushing before (even thought it's not recommended on the Classic), and still had the issue. Guess the next step is to dig into the innards. 'bout time I got up close and personal with its internals. :)
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jonniewishbone
Senior Member


Joined: 6 Apr 2005
Posts: 225
Location: New Brunswick, Canada
Expertise: I live coffee

Espresso: Nuova Simonelli Aurelia, NS...
Grinder: Compak K10, Macap M7KR,...
Roaster: Diedrich IR3FM
Posted Mon Sep 26, 2005, 10:10am
Subject: Re: Help: Gaggia Classic brew pressure / scale problem
 

Hi SWR

You might try posting your question here.  There is a Gaggia Classic Guru here that has seen it all.  He has solved numerous problems for me if I can't find a solution here.  (which I might add is seldom)

Good luck.  I would die now without my "fix".  

Jon
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M_R
Senior Member
M_R
Joined: 8 Aug 2011
Posts: 112
Location: Sydney
Expertise: I like coffee

Espresso: Gaggia Classic
Grinder: Lelit PL043MM
Posted Fri Mar 28, 2014, 4:54pm
Subject: Re: Help: Gaggia Classic brew pressure / scale problem
 

Posting his question where, please ?
Mine is suddenly allowing water through only through the two left-hand tiny holes in the solid shower disc holder, and nothing through the two right hand holes.
Would give quids for some expert input ...
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witoldb
Senior Member


Joined: 15 Aug 2013
Posts: 105
Location: Dubai UAE
Expertise: I like coffee

Espresso: Sanremo Treviso LX,...
Grinder: Vario,Elektra MXS,...
Roaster: DIY 250g drum roaster
Posted Sat Mar 29, 2014, 12:53pm
Subject: Re: Help: Gaggia Classic brew pressure / scale problem
 

Did you remove and clean dispersion disk?
There are 2 allen bolts behind shower screen.
You might need to use some blunt tool wedged against portafilter holder to get it loose.
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