I'm having this same issue. I just cleaned all the parts of the solenoid valve because the machine was making that awful buzzing noise when making an espresso shot. After reassembling there is no more buzz and it pulls a shot like it did when it was brand new. However, it seems like water is not reaching the steam wand or hot water dispenser. When I turn the dial either way it makes what I assume is the pressure building sound the machine makes when I first turn it on. But, no water ever comes out. The next time I pull a shot, all sorts of steam comes out of the grouphead. So steam is being generated but somehow trapped inside the machine. I've reattached everything exactly as it was before I removed and cleaned the solenoid valve. Any ideas what I need to do to get water flowing to the steam wand/hot water dispenser again?