When I turn on my Giotto all pressure drops immediately when I use the steam option (coffee works fine) for the first time. After the pressure builds up again, all seems to be working OK. This happens each time when using the machine. So why is this happening and how can this be resolved? It never happend before.
i have had this same problem and i can tell you for sure that the problem is the anti-vac valve. its a cheap part so you can replace it yourself but this typical with these machines, it prefers the steam valve to be opened when the machine is first turned on to avoid any annoying, sudden drop in pressure when first used.
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Good question. I have been surprised before today after checking the manual for various gadgets. There are thousands of manuals online which can be searched for if it is missing. We have a bench top water filter fitted. When you have one of those, the difference is so noticeable that you will only want drinking water from there
Have you checked the Thermostat on the unit in the tank if it is stuck it will cause the tank to over heat and pop off the steam valve?? there should be some resettable overheat protectors as well. Has the preassure relief valve been replaced as well??
Try this open the steam valve when you turn the machine on, leave the valve open until it starts to hiss with steam, then turn off valve. If that works then the vent valve is sticking and needs to be replaced.
The vent valve on the machine is stuck in the open position. Turn on the machine and open the steam wand until you hear a hiss or see small water bubbles from nozzle, let it steam out a little more then close wand, that should allow the machine to heat up correctly, then order a new vent valve for the machine.
Check the shower screen and diffuser in the head, they might be blocked, if not, check the metering jet at the top of the head(large nut) CAREFUL, make sure machine is off and cool before removing, use a paperclip or pipe cleaner to clear blockage. If not blocked then you will have to check the brew solenoid.
If when you installed the new pump and turned it on and made loud vibrating sound but not pumping any water through what you need to do is when you turn the pump on open up your steam valve turning the steam knob. Usually it is just an air lock and this should allow the air out and water to flow through. When water comes out of the steam arm, close it off and water should then come out the group head as normal. If you try this and nothing happens you either have a build up of scale which you just need to try to flush a good descaler (Puly Baby Powder) through your machine or the pump you got is faulty.
Ther is a very simle heating cirquit with a prssure swithch including a Cherry micro swithc. This thing is rated max 60C. With time the plastic just get bent out of shape and you have no pressure. have fixed by changing the Pressostate or just the Cherry switch. The Element must come on at low pressure. It has an mechanical setpoint. So hotter coffe (higher steam press) can be set with a scew driver. Finally the safety valve lifts and you have learnt a little re boilers. Leaking safety valve need a new seal, Be careful,,if not, your ECM will serve the first espresso on the moon/// Olev
My friend, had the same feeling,,,What have a done !! This piece of junk for all my dollars! No ,,it needs cleaning. Read all my comments re this. You can open this machine witha few fixed keys and mantain it. It will outlast you, when correctly mantained. All solid cupper and metal, no plastic. take it apart and CLEAN IT!
Remember - it is built by a human beeing. The ECM is a buty as it has very little automation built in. Very siple function = löong time in love with your machine. It is totally ANALOG = tweek it = better cogffee. /// Olev
What you see is condensed stem comming out and no water. The pump is not sucking from the tank as ther is an air bubble in suction line. Still want coffe and don't want to clean your machine??? Flick up the lever with no group in place. Steam comes first then nothing. Pump is running and - voila - water comes as air bubble is gone. (Specially the first cup , never the following ones.) Now put back the group and brew your espresso. The machine is full of scale and neds total clean - by hand./// Olev