steven_meyer Senior Member Joined: 19 Jul 2003 Posts: 456 Location: San Bruno, ca Expertise: I love coffee
Espresso: Alex Duetto 3.0, ECM Giotto... Grinder: mahlkonig vario, Mazzer Mini
Posted Mon Dec 10, 2012, 7:04pm Subject: Giotto problem
I need some help. Upon starting my machine this afternoon. the power light came on, but there has been no pressure building or heating of the unit. Is there anything anyone here sees that i may try before bring in my machine for service (repair)? One more thing, water does come though the group head but it is cold.
stefano65 Senior Member Joined: 30 Oct 2004 Posts: 1,334 Location: Eugene OR Expertise: Professional
Espresso: Vibiemme,Elektra, Grinder: Vario,Macap, Vac Pot: not Drip: not Roaster: not
Posted Tue Dec 11, 2012, 8:44am Subject: Re: Giotto problem
Most common issue can be the the safety thermostat, Heating element, pressurestat, and depends on your version of giotto the relay inside the control box going in order of more to less common,
Your machine SHOULD have a resettable safety thermostat, sometimes they do work and prevent the HE from burning, so try the reset button first, however you need to figure out what happened to the machine to overheat no matter what
SStones Senior Member Joined: 24 Nov 2012 Posts: 208 Location: Canada Expertise: Professional
Espresso: Giga 5, ECM Giotto, Rocket... Grinder: Anfim Milano-Best Vac Pot: No :( Drip: Some $30 thing from Walmart Roaster: I buy pre-roasted.
Posted Tue Dec 11, 2012, 7:34pm Subject: Re: Giotto problem
To add to the previous suggestions... Your safety thermostat, if your machine has it (Some years of Giottos don't) will be a little black circle on the top of your boiler. It has two wires connected to it and a red button in the middle. If you feel the button click, it was triggered and you have just reset it.
If it isn't the safety (Or you don't have one) try banging the pressostat lightly with the plastic end of a screwdriver. If this fixed it briefly, you will need to replace the pressostat soon. And try banging the powerboard with the plastic end of a screwdriver. If this fixes it briefly, you will need to replace the powerboard soon, or solder a new relay onto the board. If none of these things make a difference, you're going to want to check the voltage across various parts of the heating-circuit.
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