nightrave Senior Member Joined: 19 May 2014 Posts: 2 Location: dubin Expertise: Just starting
Posted Mon May 19, 2014, 10:49pm Subject: Muddy cold water instead of coffee out of gaggia classic
Hi guys! This is my first post here so please excuse me if I don't do it 100% right.
Just bought a used gaggia classic and gaggia mdf grinder in addition to it. I have backflushed it, descaled it and cleaned the gasket plus changed the group gasket. The seller was claiming the machine is working fine. I turn it on, wait for about 5 mins, grind the coffee with Gaggia MDF at level 7, put the coffee in and turn it on. Ir buzzes and then muddy cold water comes out of it. Any ideas on where should I check first?
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 7,772 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Vene. A1, La Cimbali M32 Grinder: Azkoyen Capriccio, Major Vac Pot: 40s era Silex Drip: Msl. Com. brewers Roaster: gave it a try, decided no
Posted Tue May 20, 2014, 2:14pm Subject: Re: Muddy cold water instead of coffee out of gaggia classic
Hi and welcome.
It takes about half an hour for the machine to stabilize at temp, not 5 minutes. By then though, you should be able to feel heat in the boiler if you have the machine open. If the boiler is getting hot then wait longer but if it is not getting warm, you need to check that the heater is getting power or more likely, the machine has been run dry and the heater is burned out and needs to be replaced. Off the top of my head, I seem to remember that that machine has the heater cast into the boiler so the above statement about burning it out may not apply.
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Posted Wed May 21, 2014, 7:12am Subject: Re: Muddy cold water instead of coffee out of gaggia classic
I just bought a new gaggia classic about a month ago, and I do like to let it warm up for closer to 20 - 30 minutes, but I can get hot water moving through the system within minutes... certainly under 5, and probably closer to 2.
I agree that this sounds like something with the heater / boiler. Hopefully it was not allowed to sit powered on and heat up without water in it (which can burn out the boiler). Depending on whether or not it was well maintained, it could just be a load of buildup... you may want to check out the Gaggia User Group (GUG) -- they have a great Gaggia-specific reference library and forum, and specifically give some good tips that you may find useful in troubleshooting this.
Fortunately you can pretty much disassemble the whole machine and replace just what needs to be replaced (if you're up for it, and if it comes down to needing to replace parts). The crew over at GUG have way more experience than I do...
RichardCoffee Senior Member Joined: 2 Dec 2010 Posts: 124 Location: Long Beach Expertise: I live coffee
Espresso: gaggia baby twin, mini... Grinder: fiorenzato pietro 63mm,... Roaster: weber grill with rk drum,...
Posted Wed May 21, 2014, 7:44am Subject: Re: Muddy cold water instead of coffee out of gaggia classic
This has nothing to do with the heat, but I have a Gaggia Baby Twin and MDF grinder. When you get the boiler working, I'd suggest you'll need to grind finer then 7 on the grinder. I'd start at least at 5. Depending on the coffee, I sometimes go as low as 3.
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