Dudley Senior Member Joined: 20 Apr 2013 Posts: 4 Location: Vernon Expertise: I love coffee
Posted Sat Apr 20, 2013, 1:12pm Subject: Black specks in the water...........
I have a Maxim Crema model EX400 Espresso machine. I haven't used it for a while and when I ran some plain water through it there were several black specks in the cup. I ran some cleaner through the machine...no change. I ran a mixture of vinegar through again no change.
Is anyone familiar with this type of machine and if so any ideas as how to clean it or the cause of the black specks.
jonbik Senior Member Joined: 21 Apr 2013 Posts: 28 Location: McLean Expertise: I love coffee
Posted Sun Apr 21, 2013, 8:25am Subject: Re: Black specks in the water...........
Usually, black specs are just coffee grinds stuck in the group head. Occasionally, there is sediment build up in the pipes of the machine. This is what descaling should take care of. I advise you to purchase a descaling solution and use that.
Posted Sun Apr 21, 2013, 9:38am Subject: Re: Black specks in the water...........
Maxim machines are also sold under the Salton and Black & Decker brand in the US. I would be very leery of running any descaler through the machine until you've determined whether the boiler is aluminum or stainless. or even if it has a boiler and isn't just a thermoblock machine. I can't find anything about the EX400 on line, and the EX 450 doesn't look as if it would be professional level parts or construction.
Aluminum oxide is black, so there's a possibility that you've got an oxidizing boiler. I'd do some more research into the construction of the machine.
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